A T-72 tank is seen on a shooting range during the military exercise "Preparation and use of troops in the interests of repelling aggression against the Republic of Belarus", near the city of Borisov, Belarus September 11, 2018. REUTERS/Vasily Fedosenko

Members of the Bandera Cattle Company Gunfighters shoot blanks into the air to attract event goers to a gun show during Memorial Day weekend in Bandera, Texas, U.S. on May 26, 2018. Picture taken on May 26, 2018. REUTERS/Adrees Latif

Bullets are pictured on a machine gun as armed forces members patrol during an operation against drug dealers in Vila Kennedy slum, in Rio de Janeiro, Brazil February 23, 2018. REUTERS/Ricardo Moraes

Indian Border Security Force (BSF) soldiers carry the coffin of their fallen colleague, who was killed in a gunfight with suspected militants at an Indian Border Security Force (BSF) camp on Tuesday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, October 4, 2017. REUTERS/Danish Ismail

Indian Border Security Force (BSF) soldiers salute at the coffin of their fallen colleague, who was killed in a gunfight with suspected militants at an Indian Border Security Force (BSF) camp on Tuesday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, October 4, 2017. REUTERS/Danish Ismail

Indian Border Security Force (BSF) soldiers carry the coffin of their fallen colleague, who was killed in a gunfight with suspected militants at an Indian Border Security Force (BSF) camp on Tuesday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, October 4, 2017. REUTERS/Danish Ismail

An Iraqi special forces gestures after an Islamic State suicide car bomb attack during gunfight in Tahrir neighbourhood of Mosul, Iraq, November 17, 2016. REUTERS/Goran Tomasevic

An Iraqi special forces soldier runs across a street after an Islamic State suicide car bomb attack during gunfight in Tahrir neighbourhood of Mosul, Iraq, November 17, 2016. REUTERS/Goran Tomasevic

Iraqi special forces soldier run across a street after an Islamic State suicide car bomb attack during gunfight in Tahrir neighbourhood of Mosul, Iraq, November 17, 2016. REUTERS/Goran Tomasevic

An Iraqi special forces soldier aims his sniper rifle during gunfight with Islamic State fighters inTahrir neighbourhood of Mosul, Iraq, November 17, 2016. REUTERS/Goran Tomasevic

An Iraqi special forces soldier jumps form stairs after an Islamic State suicide car bomb attack during gunfight in Tahrir neighbourhood of Mosul, Iraq, November 17, 2016. REUTERS/Goran Tomasevic

Members of the Philippine National Police (PNP) gather in front of the body of what the local police said was a suspected drug pusher, who was killed with other suspected drug pushers in a gunfight with local police during an anti-illegal drug operation, in metro Manila, Philippines November 10, 2016. REUTERS/Romeo Ranoco

Funeral workers carry the body of what local police said was a suspected drug pusher, who was killed with other suspected drug pushers in a gunfight with local police during an anti-illegal drug operation, in metro Manila, Philippines November 10, 2016. REUTERS/Romeo Ranoco

Funeral workers carry the body of what local police said was a suspected drug pusher, who was killed with other suspected drug pushers in a gunfight with local police during an anti-illegal drug operation, in metro Manila, Philippines November 10, 2016. REUTERS/Romeo Ranoco

Funeral workers carry the body of Rizaldy Alvarez who died after a gunfight with local police inside his house during a drug bust in metro Manila, Philippines October 19, 2016. REUTERS/Romeo Ranoco

Children peep through a window to view the interior of the house of Rizaldy Alvarez, who was killed in a gunfight with local police during a drug bust in metro Manila, Philippines October 19, 2016. REUTERS/Romeo Ranoco

Children peep through a window to view the interior of the house of Rizaldy Alvarez, who was killed in a gunfight with local police during a drug bust in metro Manila, Philippines October 19, 2016. REUTERS/Romeo Ranoco

Archana Ramasundram, the Director General of Sashastra Seema Bal (SSB), lays a wreath at a coffin of her fallen colleague who was killed in a gunfight with militants in Zakura on Friday, during a wreath-laying ceremony on the outskirts of Srinagar, October 15, 2016. REUTERS/Danish Ismail

Indian police officers and Sashastra Seema Bal (SSB) troopers carry the coffin of their fallen colleague who was killed in a gunfight with militants in Zakura on Friday, during a wreath-laying ceremony on the outskirts of Srinagar, October 15, 2016. REUTERS/Danish Ismail

Policemen guard a crime scene after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez

A soldier keeps watch while standing on a hill after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez

Soldiers patrol an area after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez

A policeman guards a crime scene after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez

Forensic workers stand next to the wreckage of a car at a crime scene after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez

Policemen are silhouetted as they guard a crime scene after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez

Soldiers patrol on foot at a cemetery after a gunfight with unknown assailants at Juarez Valley, on the outskirts of Ciudad Juarez, Mexico, October 6, 2016. Picture taken October 6, 2016. REUTERS/Jose Luis Gonzalez TPX IMAGES OF THE DAY

Indian Border Security Force (BSF) troopers carry the coffin of their fallen colleague who was killed in a gunfight with militants at an Indian army camp at Baramulla on Sunday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, October 3, 2016. REUTERS/Danish Ismail

Indian Border Security Force (BSF) troopers carry the coffin of their fallen colleague who was killed in a gunfight with militants at an Indian army camp at Baramulla on Sunday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, October 3, 2016. REUTERS/Danish Ismail

Indian policemen take position behind a jeep near the site of a gunfight between Indian Security Forces and suspected militants in Srinagar, August 15, 2016. REUTERS/Danish Ismail

Indian Border Security Force (BSF) soldiers salute next to coffins containing the bodies of their colleagues, who according to local media was killed in a gunfight with suspected militants near Line of Control (LOC) with Pakistan in Kupwara district on Monday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, August 9, 2016. REUTERS/Danish Ismail

Indian Border Security Force (BSF) soldiers carry a coffin containing the body of their colleague, who according to local media was killed in a gunfight with suspected militants near the Line of Control (LOC) with Pakistan in Kupwara district on Monday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, August 9, 2016. REUTERS/Danish Ismail

Indian Border Security Force (BSF) soldiers carry a coffin containing the body of their colleague, who according to local media was killed in a gunfight with suspected militants near the Line of Control (LOC) with Pakistan in Kupwara district on Monday, during a wreath laying ceremony in Humhama, on the outskirts of Srinagar, August 9, 2016. REUTERS/Danish Ismail

A child walks past a gate with bullet holes after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A view of the feet of a girl who was injured in a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A girl who was injured in a gunfight outside a MERCAL, a state-run supermarket, leaves from a hospital in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A blood stain is seen after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A child touches bullet holes after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A child touches bullet holes after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A child stands next to a gate with bullet holes after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A girl reacts as she touches a bullet hole after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

Bullet holes are seen after a gunfight outside a MERCAL, a state-run supermarket in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

Bullet holes are seen after a gunfight outside a MERCAL, a state-run supermarket in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

A child looks through a bullet hole after a gunfight outside a MERCAL, a state-run supermarket, in a slum in Caracas, Venezuela June 13, 2016. REUTERS/Ivan Alvarado

Jugglers perform to collect money for the family of a colleague, who they said was killed by a stray bullet during a gunfight between police and a gang member, in San Salvador, El Salvador April 12, 2016. REUTERS/Jose Cabezas

A balloon bursts as a juggler performs to collect money for the family of a colleague, who they said was killed by a stray bullet during a gunfight between police and a gang member, in San Salvador, El Salvador April 12, 2016. REUTERS/Jose Cabezas

Jugglers perform to collect money for the family of a colleague, who they said was killed by a stray bullet during a gunfight between police and a gang member, in San Salvador, El Salvador April 12, 2016. REUTERS/Jose Cabezas

Jugglers perform to collect money for the family of a colleague, who they said was killed by a stray bullet during a gunfight between police and a gang member, in San Salvador, El Salvador April 12, 2016. REUTERS/Jose Cabezas

Smoke billows from a building in which Indian authorities say suspected militants are holed up, during a gunbattle on the outskirts of Srinagar, February 22, 2016. REUTERS/Danish Ismail TPX IMAGES OF THE DAY

Smoke billows from a building, in which Indian authorities say suspected militants are holed up, during a gun battle on the outskirts of Srinagar February 22, 2016. REUTERS/Danish Ismail

Indian army soldiers take their positions near the site of a gunbattle on the outskirts of Srinagar February 22, 2016. REUTERS/Danish Ismail

Indian army soldiers take their positions near the site of a gunbattle on the outskirts of Srinagar February 22, 2016. REUTERS/Danish Ismail

Indian army soldiers take their positions near the site of a gunbattle on the outskirts of Srinagar February 22, 2016. REUTERS/Danish Ismail

Smoke billows from a building, in which Indian authorities say suspected militants are holed up, during a gun battle on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail TPX IMAGES OF THE DAY

Smoke billows from a building, in which Indian authorities say suspected militants are holed up, during a gun battle on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail

Indian army soldiers take their positions near the site of a gun battle between Indian security forces and militants on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail TPX IMAGES OF THE DAY

Indian army soldiers take their positions near the site of a gun battle between Indian security forces and militants on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail

Indian army soldiers take their positions near the site of a gun battle between Indian security forces and militants on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail

Indian army soldiers run to take their positions near the site of a gun battle between Indian security forces and militants on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail

Indian army soldiers arrive near the site of a gun battle between Indian security forces and militants on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail

An Indian army soldier uses a pair of binoculars near the site of a gun battle between Indian security forces and militants on the outskirts of Srinagar February 21, 2016. REUTERS/Danish Ismail