A member of the Organization for Security and Co-operation in Europe (OSCE) monitors the withdrawal of tanks of the Ukrainian armed forces near the village of Nyzhnje in Luhansk region, Ukraine, October 5, 2015. Ukraine has started withdrawing tanks and light artillery from the frontline in the eastern region of Luhansk in accordance with a recent agreement with pro-Russian separatists, the Ukrainian military said on Monday. REUTERS/Stringer 

A boy living in a border village looks at a mobile phone after being evacuated to a shelter, just south of the demilitarised zone separating the two Koreas, in Yeoncheon, South Korea, August 22, 2015. Top aides to the leaders of North and South Korea will meet at the Panmunjom truce village straddling their military border at 0900 GMT on Saturday to discuss the situation on the Korean peninsula, the South's presidential office said. The agreement to meet for dialogue comes amid high tensions following an exchange of artillery fire on Thursday and a late-Saturday deadline set by the North for the South to stop propaganda broadcasts that prompted Pyongyang to vow further military action. REUTERS/Kim Hong-Ji 

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY

A boy, injured from what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in Ain Larouz village in the Jabal al-Zawiya region, reacts at a field hospital in Idlib province, May 15, 2015. REUTERS/Abed Kontar TPX IMAGES OF THE DAY

An Israeli army mobile artillery cannon fires a shell during a military exercise in the West Bank village of Khirbit Altaweel east of Nablus May 3, 2015. REUTERS/Abed Omar Qusini

An Israeli soldier directs a mobile artillery unit in the Druze village of Buqata in the Golan Heights April 27, 2015. An Israeli air strike killed four militants on Sunday as they placed an explosive on a fence near Israel's frontier with Syria in the annexed Golan Heights, an Israeli military source said. Tensions have risen in the Golan Heights, territory Israel captured from Syria in a 1967 war and later annexed in a move never recognised internationally, amid the civil war raging in Syria in the past four years. REUTERS/Baz Ratner

Druze children look at an Israeli army mobile artillery unit in Buqata in the Golan Heights April 27, 2015. An Israeli air strike killed four militants on Sunday as they placed an explosive on a fence near Israel's frontier with Syria in the annexed Golan Heights, an Israeli military source said. Tensions have risen in the Golan Heights, territory Israel captured from Syria in a 1967 war and later annexed in a move never recognised internationally, amid the civil war raging in Syria in the past four years. REUTERS/Baz Ratner

An Israeli soldier is seen in a mobile artillery unit in the Druze village of Buqata in the Golan Heights April 27, 2015. An Israeli air strike killed four militants on Sunday as they placed an explosive on a fence near Israel's frontier with Syria in the annexed Golan Heights, an Israeli military source said. Tensions have risen in the Golan Heights, territory Israel captured from Syria in a 1967 war and later annexed in a move never recognised internationally, amid the civil war raging in Syria in the past four years. REUTERS/Baz Ratner

Armed men of the separatist self-proclaimed Donetsk People's Republic army sit on top of their mobile artillery cannons as they wait for a convoy to start pulling back from Donetsk February 28, 2015. REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

Armed men of the separatist self-proclaimed Donetsk People's Republic army sit on top of their mobile artillery cannons as they wait for a convoy to start pulling back from Donetsk February 28, 2015. REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

Armed men of the separatist self-proclaimed Donetsk People's Republic army ride on top of their mobile artillery cannons as their convoy starts pulling back from Donetsk February 28, 2015. REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

Armed men of the separatist self-proclaimed Donetsk People's Republic army wait near their mobile artillery cannons for a convoy to start pulling back from Donetsk February 28, 2015. REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

An armed man with the separatist self-proclaimed Donetsk People's Republic army salutes from the top of a mobile artillery cannon as his convoy starts pulling back from Donetsk February 28, 2015. REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

An armed man of the separatist self-proclaimed Donetsk People's Republic army waits on top of a mobile artillery cannon for a convoy to start pulling back from Donetsk February 28, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

Armed men of the separatist self-proclaimed Donetsk People's Republic army sit on top of their mobile artillery cannons as they wait for a convoy to start pulling back from Donetsk February 28, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

People look out from a bus at a separatist self-proclaimed Donetsk People's Republic army mobile artillery cannon about to pull back from Donetsk, February 26, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

People on a bus look at a man in a separatist self-proclaimed Donetsk People's Republic army mobile artillery cannon about to pull back from Donetsk, February 26, 2015.
REUTERS/Baz Ratner(UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY TPX IMAGES OF THE DAY) 

A man waits for a convoy of mobile artillery cannons of the separatist self-proclaimed Donetsk People's Republic army to start pulling back from Donetsk February 26, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

The driver of a separatist self-proclaimed Donetsk People's Republic army mobile artillery cannon waits for his convoy to start pulling back from Donetsk , February 26, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

The driver of a separatist self-proclaimed Donetsk People's Republic army mobile artillery cannon waits for a convoy to start pulling back from Donetsk, February 26, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Soldiers of the separatist self-proclaimed Donetsk People's Republic army ride in mobile artillery cannons as they are pulling back from from Debaltseve, February 25, 2015. Ukraine's military said on Wednesday none of its troops had been killed at the front in the last 24 hours and only one had been wounded, with a spokesman describing it as the first day with no fatalities in "at least several weeks".
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY TPX IMAGES OF THE DAY) 

Trucks of the separatist self-proclaimed Donetsk People's Republic army towing mobile artillery cannons, are seen as they pull back from Donetsk, February 24, 2015.REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Trucks of the separatist self-proclaimed Donetsk People's Republic army towing mobile artillery cannons, are seen as they pull back from Donetsk, February 24, 2015.REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

An armed man stands near trucks of the separatist self-proclaimed Donetsk People's Republic army towing a mobile artillery cannons, as they pull back from Donetsk , February 24, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

An armed man stands near a truck of the separatist self-proclaimed Donetsk People's Republic army towing a mobile artillery cannon, as they pull back from Donetsk, February 24, 2015.
REUTERS/Baz Ratner(UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY TPX IMAGES OF THE DAY) 

An armed man stands near a truck of the separatist self-proclaimed Donetsk People's Republic army towing a mobile artillery cannon, as they pull back from Donetsk , February 24, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

An armed man stands near a truck of the separatist self-proclaimed Donetsk People's Republic army towing a mobile artillery cannon, as they pull back from Donetsk, February 24, 2015.
REUTERS/Baz Ratner(UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

A driver is reflected in the side mirror of a separatist self-proclaimed Donetsk People's Republic army truck towing a mobile artillery cannon, as they pull back from Donetsk, February 24, 2015.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Fighters with the separatist self-proclaimed Donetsk People's Republic army ride in the back of a truck towing a mobile artillery cannon as they leave the frontline, and head toward Donetsk, February 23, 2015. Kiev accused pro-Russian rebels of opening fire with rockets and artillery at villages in southeastern Ukraine on Monday, all but burying a week-old European-brokered ceasefire deal. REUTERS/Baz Ratner(UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Fighters with the separatist self-proclaimed Donetsk People's Republic army ride in the back of a truck towing a mobile artillery cannon as they leave the frontline, and head toward Donetsk February 22, 2015.
Pro-Moscow rebels said they would start to withdraw heavy weapons from the front line in eastern Ukraine on Sunday but the government in Kiev said armoured columns had crossed the border from Russia to reinforce the separatists. REUTERS/Baz Ratner(UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Fighters with the separatist self-proclaimed Donetsk People's Republic army sit on top of mobile artillery units in the town of Debaltseve February 22, 2015. Pro-Moscow rebels said they would start to withdraw heavy weapons from the front line in eastern Ukraine on Sunday but the government in Kiev said armoured columns had crossed the border from Russia to reinforce the separatists.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

Members of the armed forces of the separatist self-proclaimed Donetsk People's Republic stand on top of mobile artillery outside the town of Vuhlehirsk near Donetsk, Ukraine, February 14, 2015. Fighting intensified in eastern Ukraine on Saturday as separatist rebels tried to seize more territory before a ceasefire takes effect at midnight, the Ukrainian military said.
The truce envisages the creation of a neutral "buffer zone" and withdrawal of heavy weapons responsible for many of the 5,000 casualties in a conflict that began almost a year ago and gave rise to the worst crisis in relations between Russia and the West since the Cold War a generation ago.
REUTERS/Baz Ratner (UKRAINE - Tags: POLITICS CIVIL UNREST) 

A man talks on mobile phone near a Syrian national flag after fighters loyal to Syria's president Bashar Al-Assad regained control of Deir al-Adas, a town south of Damascus, Daraa countryside February 10, 2015. Syrian government troops and their allies in the Lebanese group Hezbollah pressed a major offensive in southern Syria on Wednesday, taking new ground in a campaign against insurgents who pose one of the biggest remaining threats to Damascus. Syrian state TV broadcast live from Deir al-Adas, a town some 30 km (19 miles) south of Damascus that it said had been captured. The sound of artillery being fired could be heard. The nearby town of Deir Maker was also captured, state TV said. Picture taken February 10, 2015. REUTERS/Stringer (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

ATTENTION EDITORS - VISUAL COVERAGE OF SCENES OF INJURY

An injured boy sits in a field hospital after what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in the Douma neighbourhood of Damascus, February 8, 2015. REUTERS/ Mohammed Badra (SYRIA - Tags: CIVIL UNREST CONFLICT TPX IMAGES OF THE DAY) 

Israeli soldiers stand next to ammunition and a mobile artillery unit near the border with Syria in the Golan Heights January 28, 2015. Israeli aircraft struck Syrian army artillery positions early on Wednesday, the military said, in retaliation for rockets launched at the Israel-occupied Golan Heights a day earlier. The strike came amid rising frontier tension 10 days after an Israeli air strike in Syria killed an Iranian general and several Lebanese Hezbollah guerrillas. REUTERS/Baz Ratner (MILITARY POLITICS CIVIL UNREST CONFLICT) 

Israeli soldiers stand next to a mobile artillery unit near the border with Syria in the Golan Heights January 28, 2015. Israeli aircraft struck Syrian army artillery positions early on Wednesday, the military said, in retaliation for rockets launched at the Israel-occupied Golan Heights a day earlier. The strike came amid rising frontier tension 10 days after an Israeli air strike in Syria killed an Iranian general and several Lebanese Hezbollah guerrillas. REUTERS/Baz Ratner (MILITARY POLITICS CIVIL UNREST TPX IMAGES OF THE DAY) 

Israeli soldiers walk near mobile artillery units near the border with Syria in the Golan Heights January 27, 2015. At least two rockets from Syria hit the Israeli-occupied Golan Heights on Tuesday and Israel returned fire, the military said, nine days after an Israeli air strike in Syria killed an Iranian general and several Lebanese Hezbollah guerrillas. REUTERS/Baz Ratner (MILITARY POLITICS CIVIL UNREST) 

Israeli soldiers are seen next to mobile artillery units near the border with Syria in the Golan Heights January 27, 2015. At least two rockets from Syria hit the Israeli-occupied Golan Heights on Tuesday and Israel returned fire, the military said, nine days after an Israeli air strike in Syria killed an Iranian general and several Lebanese Hezbollah guerrillas. REUTERS/Baz Ratner (MILITARY POLITICS CIVIL UNREST) 

Israeli soldiers stand next to mobile artillery units near the border with Syria in the Golan Heights January 27, 2015. At least two rockets from Syria hit the Israeli-occupied Golan Heights on Tuesday and Israel returned fire, the military said, nine days after an Israeli air strike in Syria killed an Iranian general and several Lebanese Hezbollah guerrillas. REUTERS/Baz Ratner (MILITARY POLITICS CIVIL UNREST) 

Israeli soldiers are seen next to mobile artillery units near the border with Syria in the Golan Heights January 27, 2015. At least two rockets from Syria hit the Israeli-occupied Golan Heights on Tuesday and Israel returned fire, the military said, nine days after an Israeli air strike in Syria killed an Iranian general and several Lebanese Hezbollah guerrillas. REUTERS/Baz Ratner (MILITARY POLITICS CIVIL UNREST) 

An injured man waits to receive treatments at a field hospital after what activists said was shelling by forces loyal to Syria's President Bashar al-Assad in the Duma neighborhood of Damascus November 18, 2014. REUTERS/Mohammed Badra (SYRIA - Tags: CIVIL UNREST POLITICS CONFLICT) 

Free Syrian Army fighters fire a locally-made shell towards forces loyal to Syria's president Bashar al-Assad located in al-Khalidiya neighbourhood, from Bani Zeid neighbourhood in Aleppo November 10, 2014. REUTERS/Abdalrhman Ismail (SYRIA - Tags: POLITICS CIVIL UNREST CONFLICT) 

Israeli mobile artillery units point towards Lebanon near the Israel-Lebanon border, near the northern town of Kiryat Shmona October 8, 2014. An attack by Hezbollah on Lebanon's border with Israel which wounded two Israeli soldiers was a message that the group remained ready to confront its old foe despite its engagement in Syria's civil war, the group's deputy leader said. The soldiers were wounded by a bomb planted by Lebanese Hezbollah fighters in the Shebaa hills, drawing Israeli artillery fire in response. It was the first time Hezbollah has claimed responsibility for an attack against the Israeli army since 2006, when the two sides fought a 33-day war. REUTERS/Baz Ratner (ISRAEL - Tags: POLITICS CIVIL UNREST MILITARY) 

An Israeli mobile artillery unit fires towards the Gaza Strip August 1, 2014. Israel declared a Gaza ceasefire over on Friday and killed more than 50 Palestinians in renewed shelling, saying militants had breached the truce shortly after it began and apparently captured an Israeli soldier. The 72-hour break announced by U.S. Secretary of State John Kerry and U.N. Secretary-General Ban Ki-moon was the most ambitious attempt so far to end more than three weeks of fighting, and followed mounting international alarm over a rising Palestinian civilian death toll. REUTERS/ Baz Ratner (ISRAEL - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

An Israeli mobile artillery unit fires towards the Gaza Strip August 1, 2014. Israel declared a Gaza ceasefire over on Friday and killed more than 50 Palestinians in renewed shelling, saying militants had breached the truce shortly after it began and apparently captured an Israeli soldier. The 72-hour break announced by U.S. Secretary of State John Kerry and U.N. Secretary-General Ban Ki-moon was the most ambitious attempt so far to end more than three weeks of fighting, and followed mounting international alarm over a rising Palestinian civilian death toll. REUTERS/ Baz Ratner (ISRAEL - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT TPX IMAGES OF THE DAY) 

An Israeli mobile artillery unit fires towards the Gaza Strip before the ceasefire due in the early morning of August 1, 2014. Israel declared a Gaza ceasefire over on Friday and killed more than 50 Palestinians in renewed shelling, saying militants had breached the truce shortly after it began and apparently captured an Israeli soldier. The 72-hour break announced by U.S. Secretary of State John Kerry and U.N. Secretary-General Ban Ki-moon was the most ambitious attempt so far to end more than three weeks of fighting, and followed mounting international alarm over a rising Palestinian civilian death toll. REUTERS/ Baz Ratner (ISRAEL - Tags: POLITICS CIVIL UNREST MILITARY CONFLICT) 

An Israeli soldier carries a shell at a mobile artillery unit while it fires towards the Gaza Strip August 1, 2014. Israel declared a Gaza ceasefire over on Friday and killed more than 50 Palestinians in renewed shelling, saying militants had breached the truce shortly after it began and apparently captured an Israeli soldier. The 72-hour break announced by U.S. Secretary of State John Kerry and U.N. Secretary-General Ban Ki-moon was the most ambitious attempt so far to end more than three weeks of fighting, and followed mounting international alarm over a rising Palestinian civilian death toll. REUTERS/ Baz Ratner (ISRAEL - Tags: POLITICS CIVIL UNREST MILITARY CONFLICT) 

An Israeli soldier carries a shell at a mobile artillery unit while it fires towards the Gaza Strip August 1, 2014. Israel declared a Gaza ceasefire over on Friday and killed more than 50 Palestinians in renewed shelling, saying militants had breached the truce shortly after it began and apparently captured an Israeli soldier. The 72-hour break announced by U.S. Secretary of State John Kerry and U.N. Secretary-General Ban Ki-moon was the most ambitious attempt so far to end more than three weeks of fighting, and followed mounting international alarm over a rising Palestinian civilian death toll. REUTERS/ Baz Ratner (ISRAEL - Tags: POLITICS CIVIL UNREST MILITARY CONFLICT TPX IMAGES OF THE DAY) 

An Israeli mobile artillery unit fires towards the Gaza Strip August 1, 2014. Israel declared a Gaza ceasefire over on Friday and killed more than 50 Palestinians in renewed shelling, saying militants had breached the truce shortly after it began and apparently captured an Israeli soldier. The 72-hour break announced by U.S. Secretary of State John Kerry and U.N. Secretary-General Ban Ki-moon was the most ambitious attempt so far to end more than three weeks of fighting, and followed mounting international alarm over a rising Palestinian civilian death toll. REUTERS/ Baz Ratner (ISRAEL - Tags: CIVIL UNREST MILITARY POLITICS CONFLICT) 

Israeli soldiers clean the barrel of a mobile artillery unit near the border with Gaza July 30, 2014. The Israeli military said on Wednesday it would hold fire unilaterally in limited areas of the Gaza Strip for four hours from 3 p.m. (1200 GMT) for humanitarian purposes, an army statement said. Hamas described the truce as a media stunt because it only applied to some areas. REUTERS/Amir Cohen (ISRAEL - Tags: POLITICS MILITARY CIVIL UNREST CONFLICT) 

A Israeli soldier looks at shells next to a mobile artillery unit outside the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

An Israeli mobile artillery unit fires towards the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

Smoke is seen next to an Israeli mobile artillery unit after it fired towards the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

An Israeli mobile artillery unit fires towards the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

An Israeli mobile artillery unit fires towards the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY TPX IMAGES OF THE DAY) 

An Israeli soldier carries a shell to a mobile artillery unit outside the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

An Israeli mobile artillery unit fires towards the Gaza Strip July 28, 2014. Palestinian fighters slipped into an Israeli village from the Gaza Strip and fought a gun battle with troops on Monday as an unofficial truce called for the Muslim Eid al-Fitr festival disintegrated. The incident was not the only breach of the fragile truce. Eight children and two adults were killed by a blast at a park in northern Gaza and four Israelis were reported to have been killed by cross-border Palestinian mortar fire. REUTERS/Baz Ratner (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

An Israeli soldier sits atop a mobile artillery unit near the border with Gaza July 23, 2014. Gaza fighting raged on Wednesday, displacing thousands more Palestinians in the battered territory as U.S. Secretary of State John Kerry said efforts to secure a truce between Israel and Hamas had made some progress. Israel launched its offensive on July 8 to halt rocket salvoes by Hamas and its allies, which have struggled under an Israeli-Egyptian economic blockade on Gaza and angered by a crackdown on their supporters in the nearby occupied West Bank. REUTERS/Ronen Zvulun (ISRAEL - Tags: POLITICS CIVIL UNREST CONFLICT MILITARY) 

An Israeli mobile artillery unit fires towards the Gaza Strip July 23, 2014. Israeli forces pounded Gaza on Wednesday, meeting stiff resistance from Hamas Islamists and sending thousands of residents fleeing, as U.S. Secretary of State John Kerry said on a visit to Israel ceasefire talks had made some progress. Israel launched its offensive on July 8 to halt missile salvoes by Hamas and its allies, struggling under the weight of an Israeli-Egyptian economic blockade and angered by a crackdown on their supporters in the nearby occupied West Bank. REUTERS/Amir Cohen (ISRAEL - Tags: CIVIL UNREST CONFLICT MILITARY) 

Israeli soldiers help offload a mobile artillery unit from the back of a truck in a staging area outside the Gaza Strip July 22, 2014. Israel pounded targets across the Gaza Strip on Tuesday, saying no ceasefire was near as top U.S. and U.N. diplomats pursued talks on halting fighting that has claimed more than 500 lives. With the conflict entering its third week, the Palestinian death toll rose to 546, including nearly 100 children and many other civilians, Gaza health officials said. Israel's casualties also mounted, with the military announcing the deaths of two more soldiers, bringing the number of army fatalities to 27 - almost three times as many as were killed in the last ground invasion of Gaza, in a 2008-2009 war. REUTERS/Amir Cohen (ISRAEL - Tags: CONFLICT POLITICS CIVIL UNREST MILITARY) 

An Israeli soldier sits atop a mobile artillery unit in a staging area outside the Gaza Strip July 22, 2014. Israel pounded targets across the Gaza Strip on Tuesday, saying no ceasefire was near as top U.S. and U.N. diplomats pursued talks on halting fighting that has claimed more than 500 lives. With the conflict entering its third week, the Palestinian death toll rose to 546, including nearly 100 children and many other civilians, Gaza health officials said. Israel's casualties also mounted, with the military announcing the deaths of two more soldiers, bringing the number of army fatalities to 27 - almost three times as many as were killed in the last ground invasion of Gaza, in a 2008-2009 war. REUTERS/Amir Cohen (ISRAEL - Tags: CONFLICT POLITICS CIVIL UNREST MILITARY)