A Palestinian woman reacts after inhaling tear gas fired by Israeli forces during a protest marking Land Day and the first anniversary of a surge of border protests, at the Israel-Gaza border fence, in the southern Gaza Strip March 30, 2019. REUTERS/Ashraf Abu Amrah TPX IMAGES OF THE DAY 

A Palestinian woman reacts after inhaling tear gas fired by Israeli forces during a protest marking Land Day and the first anniversary of a surge of border protests, at the Israel-Gaza border fence, in the southern Gaza Strip March 30, 2019. REUTERS/Ashraf Abu Amrah 

A Palestinian boy is evacuated after inhaling tear gas fired by Israeli forces during a protest at the Israel-Gaza border fence, in the southern Gaza Strip March 1, 2019. REUTERS/Ibraheem Abu Mustafa 

A woman helps a Palestinian boy after inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border fence, east of Gaza City February 22, 2019. REUTERS/Mohammed Salem 

A woman helps a Palestinian boy after inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border fence, east of Gaza City February 22, 2019. REUTERS/Mohammed Salem 

A supporter of the opposition party gets assistance after inhaling tear gas during an anti-government protest in front of the Prime Minister Edi Rama's office in Tirana, Albania February 16, 2019. REUTERS/Florion Goga 

A supporter of the opposition party gets assistance after inhaling tear gas during an anti-government protest in front of the Prime Minister Edi Rama's office in Tirana, Albania February 16, 2019. REUTERS/Florion Goga 

A Palestinian woman is helped after inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border fence, in the southern Gaza Strip February 1, 2019. REUTERS/Ibraheem Abu Mustafa 

A Palestinian woman covering her face with a plastic bag helps a demonstrator after inhaling tear gas during a protest at the Israel-Gaza border fence, in the central Gaza Strip January 25, 2019. REUTERS/Ibraheem Abu Mustafa 

Leigh Tuttle (R) holds the inhaler for her son Weston Tuttle, 5, as he takes a deep breathe of his medication while sister Chloe Tuttle, 2, looks on at their rental home in Steilacoom, Washington, U.S. November 28, 2018. Picture taken November 28, 2018. To match Special Report USA-MILITARY/DEVELOPER REUTERS/Lindsey Wasson 

People tend to a Palestinian after inhaling tear gas fired by Israeli troops during a protest calling for lifting the Israeli blockade on Gaza, at the beachfront border with Israel, in the northern Gaza Strip November 5, 2018. REUTERS/Mohammed Salem 

A Palestinian reacts after inhaling tear gas fired by Israeli troops during a protest calling for lifting the Israeli blockade on Gaza, on a beach near the maritime border with Israel, in the northern Gaza Strip October 1, 2018. REUTERS/Mohammed Salem 

People tend to a Palestinian after inhaling tear gas during a protest calling for lifting the Israeli blockade on Gaza, near the maritime border with Israel, in the northern Gaza Strip September 17, 2018. REUTERS/Mohammed Salem TPX IMAGES OF THE DAY 

A Palestinian woman is evacuated after inhaling tear gas during a protest calling for lifting the Israeli blockade on Gaza, near the maritime border with Israel, in the northern Gaza Strip September 17, 2018. REUTERS/Mohammed Salem 

People tend to a Palestinian after inhaling tear gas during a protest calling for lifting the Israeli blockade on Gaza, near the maritime border with Israel, in the northern Gaza Strip September 17, 2018. REUTERS/Mohammed Salem 

A Palestinian woman helps a boy who inhaled tear gas fired by Israeli troops during a protest calling for lifting the Israeli blockade on Gaza, on a beach near the maritime border with Israel, in the northern Gaza Strip September 10, 2018. REUTERS/Mohammed Salem 

A medic evacuates a Palestinian boy after inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip July 6, 2018. REUTERS/Ibraheem Abu Mustafa 

A medic evacuates a Palestinian boy after inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip July 6, 2018. REUTERS/Ibraheem Abu Mustafa 

Firefighter Milan Miranda rests at Paco Fire Station in Paco, Manila, Philippines, May 4, 2018. Miranda is set to retire next year after battling blazes for 32 years. He said he was inspired by his father and uncle to join the ranks, despite the dangers. "Every fire is a challenge, especially when we lack equipment like breathing apparatus so we inhale smoke and endure the heat, risking our health and lives," Miranda said. "But this is the career given to me by God." REUTERS/Erik De Castro SEARCH "PHILIPPINES FIRE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Firefighter Milan Miranda rests at Paco Fire Station in Paco, Manila, Philippines, May 4, 2018. Miranda is set to retire next year after battling blazes for 32 years. He said he was inspired by his father and uncle to join the ranks, despite the dangers. "Every fire is a challenge, especially when we lack equipment like breathing apparatus so we inhale smoke and endure the heat, risking our health and lives," Miranda said. "But this is the career given to me by God." REUTERS/Erik De Castro SEARCH "PHILIPPINES FIRE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

Firefighter Milan Miranda rests at Paco Fire Station in Paco, Manila, Philippines, May 4, 2018. Miranda is set to retire next year after battling blazes for 32 years. He said he was inspired by his father and uncle to join the ranks, despite the dangers. "Every fire is a challenge, especially when we lack equipment like breathing apparatus so we inhale smoke and endure the heat, risking our health and lives," Miranda said. "But this is the career given to me by God." REUTERS/Erik De Castro SEARCH "PHILIPPINES FIRE" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A Palestinian demonstrator is evacuated after inhaling tear gas fired by Israeli troops during a protest marking al-Quds Day, (Jerusalem Day), at the Israel-Gaza border, east of Gaza City June 8, 2018. REUTERS/Mohammed Salem 

A Palestinian demonstrator is evacuated after inhaling tear gas fired by Israeli troops during a protest marking Naksa, at the Israel-Gaza border in the southern Gaza Strip June 5, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator is evacuated after inhaling tear gas fired by Israeli troops during a protest marking Naksa, at the Israel-Gaza border in the southern Gaza Strip June 5, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator is evacuated after inhaling tear gas fired by Israeli troops during a protest marking Naksa, at the Israel-Gaza border in the southern Gaza Strip June 5, 2018. REUTERS/Ibraheem Abu Mustafa 

Retired coal miner Kennith Adams, who has complicated black lung disease and lives connected to an oxygen supply 24 hours per day, inhales medicine while his wife Tammie keeps him company, at their home in Princeton, West Virginia, U.S., May 17, 2018. Adams has re-applied after his first federal black lung disability application was denied despite his medical condition and the coal company he worked for claimed he never worked there. REUTERS/Brian Snyder SEARCH "BLACK LUNG" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. 

A female demonstrator is evacuated after inhaling tear gas fired by Israeli troops during a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip May 25, 2018. REUTERS/Ibraheem Abu Mustafa 

A wounded Palestinian demonstrator is evacuated after inhaling tear gas fired by Israeli troops during a protest marking the 70th anniversary of Nakba, at the Israel-Gaza border in the southern Gaza Strip May 15, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator is treated after inhaling tear gas fired by Israeli troops during a protest marking the 70th anniversary of Nakba, at the Israel-Gaza border in the southern Gaza Strip May 15, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator is treated after inhaling tear gas fired by Israeli troops during a protest marking the 70th anniversary of Nakba, at the Israel-Gaza border in the southern Gaza Strip May 15, 2018. REUTERS/Ibraheem Abu Mustafa 

A female Palestinian medic is evacuated after inhaling tear gas fired by Israeli forces during a protest against U.S. embassy move to Jerusalem and ahead of the 70th anniversary of Nakba, at Israeli Qalandia checkpoint near Ramallah in the occupied West Bank May 14, 2018. REUTERS/Mohamad Torokman 

A demonstrator is evacuated after inhaling tear gas fired by Israeli troops at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, May 4, 2018. REUTERS/Ibraheem Abu Mustafa 

Shorouq Abu Musameh, who volunteers with other paramedics, tends to a Palestinian who inhaled tear gas fired by Israeli troops during a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border, in the southern Gaza Strip April 13, 2018. Picture taken April 13, 2018. REUTERS/Samar Abo Elouf 

A woman who volunteers with other paramedics is treated after inhaling tear gas fired by Israeli troops during a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border, in the southern Gaza Strip April 13, 2018. Picture taken April 13, 2018. REUTERS/Samar Abo Elouf 

A woman demonstrator is evacuated after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, April 27, 2018. REUTERS/Ibraheem Abu Mustafa 

A demonstrator is treated after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border, east of Gaza City, April 27, 2018. REUTERS/Mohammed Salem 

A demonstrator is evacuated after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, April 27, 2018. REUTERS/Ibraheem Abu Mustafa 

A refugee is treated after inhaling tear gas as refugees demonstrating against conditions in Moria camp and delays in asylum applications confront protesting groups of locals, in the city of Mytilene on the island of Lesbos, Greece, April 23, 2018. REUTERS/Elias Marcou TPX IMAGES OF THE DAY 

A refugee is treated after inhaling tear gas as refugees demonstrating against conditions in Moria camp and delays in asylum applications confront protesting groups of locals, in the city of Mytilene on the island of Lesbos, Greece, April 23, 2018. REUTERS/Elias Marcou 

A woman demonstrator lies on the ground after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border, east of Gaza City April 20, 2018. REUTERS/Mohammed Salem 

A man reacts after inhaling tear gas fired by Palestinian security forces during a protest organised by Hizb-ut Tahrir in Hebron, in the occupied West Bank, April 14, 2018. REUTERS/Mussa Qawasma inhaling 

A woman demonstrator is evacuated after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, April 13, 2018. REUTERS/Ibraheem Abu Mustafa 

A woman demonstrator is treated after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border in the southern Gaza Strip, April 13, 2018. REUTERS/Ibraheem Abu Mustafa 

A woman demonstrator is treated after inhaling tear gas fired by Israeli troops during clashes at a protest where Palestinians demand the right to return to their homeland, at the Israel-Gaza border, east of Gaza City, April 13, 2018. REUTERS/Mohammed Salem 

A Palestinian boy wears a mask with an onion to protect himself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 10, 2018. Picture taken April 10, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator wearing a mask covers his nose with a plastic cup filled with perfume and cotton to protect himself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 10, 2018. Picture taken April 10, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian man covers his nose with part of a bottle and an onion to protect himself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 6, 2018. Picture taken April 6, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian boy covers his nose with part of a pomelo to protect himself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 9, 2018. Picture taken April 9, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian medic wears a mask to protect herself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 9, 2018. Picture taken April 9, 2018. REUTERS/Ibraheem Abu Mustafa 

Palestinian boy Mazen Al-Najar covers his face with a bottle with cotton and coal to protect himself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 6, 2018. Picture taken April 6, 2018. REUTERS/Ibraheem Abu Mustafa 

Palestinian woman Jehad Abu Mehsen covers her nose with a piece of plastic and an onion to protect herself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 6, 2018. Picture taken April 6, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian girl wears a mask to protect herself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 9, 2018. Picture taken April 9, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian boy wears a mask to protect himself from inhaling tear gas fired by Israeli troops during a protest at the Israel-Gaza border in the southern Gaza Strip April 9, 2018. Picture taken April 9, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator is evacuated after inhaling tear gas during clashes with Israeli troops at the Israel-Gaza border at a protest demanding the right to return to their homeland, in the southern Gaza Strip April 6, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian demonstrator is evacuated after inhaling tear gas during clashes with Israeli troops at the Israel-Gaza border at a protest demanding the right to return to their homeland, in the southern Gaza Strip April 6, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian protects himself from inhaling tear gas at the Israel-Gaza border during a protest demanding the right to return to their homeland, in the southern Gaza Strip April 6, 2018. REUTERS/Ibraheem Abu Mustafa TPX IMAGES OF THE DAY 

A Palestinian protects himself from inhaling tear gas at the Israel-Gaza border during a protest demanding the right to return to their homeland, in the southern Gaza Strip April 6, 2018. REUTERS/Ibraheem Abu Mustafa 

A Palestinian woman protects herself from inhaling tear gas with the help of onion at the Israel-Gaza border during a protest demanding the right to return to their homeland, in the southern Gaza Strip April 6, 2018. REUTERS/Ibraheem Abu Mustafa