People take cover as riot police use pepper spray projectile during a protest at Central District, as a second reading of a controversial national anthem law takes place in Hong Kong, China May 27, 2020. REUTERS/Tyrone Siu

People take cover as riot police use pepper spray projectile during a protest as a second reading of a controversial national anthem law takes place in Hong Kong, China May 27, 2020. REUTERS/Tyrone Siu

People take cover as riot police use pepper spray projectile during a protest as a second reading of a controversial national anthem law takes place in Hong Kong, China May 27, 2020. REUTERS/Tyrone Siu

Ysmail Perez, 16, shows the scar on his head caused by a projectile fired by the riot police, ESMAD, during an eviction operation, amid the coronavirus disease (COVID-19) outbreak in Bogota, Colombia May 15, 2020. REUTERS/Luisa Gonzalez TPX IMAGES OF THE DAY

Riot police raise their pepper spray projectile inside a shopping mall as they disperse anti-government protesters during a rally, in Hong Kong, China May 10, 2020. REUTERS/Tyrone Siu

Riot police raise their pepper spray projectile inside a shopping mall as they disperse anti-government protesters during a rally, in Hong Kong, China May 10, 2020. REUTERS/Tyrone Siu

Riot police raise their pepper spray projectile inside a shopping mall as they disperse anti-government protesters during a rally, in Hong Kong, China May 10, 2020. REUTERS/Tyrone Siu

Riot police raise their pepper spray projectile inside a shopping mall as they disperse anti-government protesters during a rally, in Hong Kong, China May 10, 2020. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY

A riot police officer holds a pepper spray projectile as he disperse anti-government protesters from a shopping mall during a rally following the coronavirus disease (COVID-19) outbreak, in Hong Kong, China May 1, 2020. REUTERS/Tyrone Siu

A demonstrator hurls projectile towards security forces during a protest against Chile's government in Santiago, Chile March 13, 2020. REUTERS/Pablo Sanhueza

Demonstrators launch projectiles during a protest against Chile's government in Santiago, Chile March 13, 2020. REUTERS/Ivan Alvarado

A man watches a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, March 9, 2020. REUTERS/Heo Ran

A woman walks past a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, March 9, 2020. REUTERS/Heo Ran

A man walks past a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, March 9, 2020. REUTERS/Heo Ran

Protesters hurl projectiles towards riot police during a protest called by high school students against the Chilean government and the public education system while starting the academic year, in Santiago, Chile March 5, 2020. REUTERS/Pablo Sanhueza

A protester hurls projectile towards a riot police during a protest called by high school students against the Chilean government and the public education system while starting the academic year, in Santiago, Chile March 5, 2020. REUTERS/Pablo Sanhueza

A protester hurls projectile towards a riot police vehicle during a protest called by high school students against the Chilean government and the public education system while starting the academic year, in Santiago, Chile March 5, 2020. REUTERS/Pablo Sanhueza REFILE - CORRECTING BYLINE

A man watches a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, March 2, 2020. REUTERS/Heo Ran

A man walks past a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, March 2, 2020. REUTERS/Heo Ran

People watch a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, March 2, 2020. REUTERS/Heo Ran TPX IMAGES OF THE DAY

A man walks past a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, March 2, 2020. REUTERS/Heo Ran

People watch a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, March 2, 2020. REUTERS/Heo Ran

A masked protester throws a projectile towards police during a demonstration by French labour union members and workers on strike in Nantes during the 36th consecutive day of strike against French government's pensions reform plans in France, January 9, 2020. REUTERS/Stephane Mahe

A demonstrator hurls a projectile towards the security forces during a protest against Chile's government in Santiago, Chile December 27, 2019. REUTERS/Pablo Sanhueza

People watch a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, November 28, 2019. REUTERS/Kim Hong-Ji

People watch a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, November 28, 2019. REUTERS/Kim Hong-Ji

People watch a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, November 28, 2019. REUTERS/Kim Hong-Ji

A man sits in front of a TV broadcasting file footage for a news report on North Korea firing an unidentified projectile, in Seoul, South Korea, November 28, 2019. REUTERS/Kim Hong-Ji

A protester hurls projectile towards police during clashes at Hong Kong Polytechnic University (PolyU) n Hong Kong, China November 18, 2019. REUTERS/Tyrone Siu

A racket used for returning tear gas projectiles is pictured on a barricade at the Chinese University in Hong Kong, China, November 13, 2019. REUTERS/Thomas Peter

Demonstrators throw projectiles toawards a police vehicle during a protest against Chile's government in Santiago, Chile November 4, 2019. REUTERS/Pablo Sanhueza

People watch a TV broadcast showing a file footage for a news report on North Korea firing two projectiles, possibly missiles, into the sea between the Korean peninsula and Japan, in Seoul, South Korea, October 31, 2019. REUTERS/Heo Ran

People watch a TV broadcast showing a file footage for a news report on North Korea firing two projectiles, possibly missiles, into the sea between the Korean peninsula and Japan, in Seoul, South Korea, October 31, 2019. REUTERS/Heo Ran

People watch a TV broadcast showing a file footage for a news report on North Korea firing two projectiles, possibly missiles, into the sea between the Korean peninsula and Japan, in Seoul, South Korea, October 31, 2019. REUTERS/Heo Ran

People watch a TV broadcast showing a file footage for a news report on North Korea firing two projectiles, possibly missiles, into the sea between the Korean peninsula and Japan, in Seoul, South Korea, October 31, 2019. REUTERS/Heo Ran

People watch a TV broadcast showing a file footage for a news report on North Korea firing two projectiles, possibly missiles, into the sea between the Korean peninsula and Japan, in Seoul, South Korea, October 31, 2019. REUTERS/Heo Ran

People watch a TV broadcast showing a file footage for a news report on North Korea firing two projectiles, possibly missiles, into the sea between the Korean peninsula and Japan, in Seoul, South Korea, October 31, 2019. REUTERS/Heo Ran

A riot police officer fires pepper-spray projectile toward anti-government protesters demonstrating near the Legislative Council building in Hong Kong, China, September 29, 2019. Picture taken Spetember 29, 2019. REUTERS/Athit Perawongmetha

A riot police officer fires pepper-spray projectile toward anti-government protesters demonstrating near the Legislative Council building in Hong Kong, China, September 29, 2019. Picture taken Spetember 29, 2019. REUTERS/Athit Perawongmetha

Anti-government protesters pile up projectiles to block police from entering New Town Plaza at Sha Tin, Hong Kong, China September 22, 2019. REUTERS/Tyrone Siu

Anti-government protesters pile up projectiles to block police from entering New Town Plaza at Sha Tin, Hong Kong, China September 22, 2019. REUTERS/Tyrone Siu

A piece of framing lumber from a nearby destroyed home that became a projectile and pierced an adjacent house's roof is seen after a tornado spawned by Hurricane Dorian ripped through Carolina Shores, North Carolina, U.S., September 6, 2019. REUTERS/Jonathan Drake

A piece of framing lumber from a nearby destroyed home that became a projectile and pierced an adjacent house's roof is seen after a tornado spawned by Hurricane Dorian ripped through Carolina Shores, North Carolina, U.S., September 6, 2019. REUTERS/Jonathan Drake

A man walks past a TV broadcasting a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, August 6, 2019. REUTERS/Kim Hong-Ji

A man watches a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, August 6, 2019. REUTERS/Kim Hong-Ji

People watch a TV broadcasting a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, August 6, 2019. REUTERS/Kim Hong-Ji

Women walk past a TV showing a file picture for a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, August 6, 2019. REUTERS/Kim Hong-Ji

People watch a TV broadcasting a news report on North Korea firing two unidentified projectiles, in Seoul, South Korea, August 6, 2019. REUTERS/Kim Hong-Ji

UPDATE July 31. Corea del Norte disparó el jueves dos misiles de corto alcance desde su costa este, dijo un funcionario de Corea del Sur.

A projectile launched at Saudi Arabia by YemenÕs Houthis is displayed at a Saudi military base, Al-Kharj, Saudi Arabia June 21, 2019. REUTERS/Stephen Kalin

A projectile launched at Saudi Arabia by YemenÕs Houthis is displayed at a Saudi military base, Al-Kharj, Saudi Arabia June 21, 2019. REUTERS/Stephen Kalin

A projectile and a drone launched at Saudi Arabia by YemenÕs Houthis are displayed at a Saudi military base, Al-Kharj, Saudi Arabia June 21, 2019. REUTERS/Stephen Kalin

Trails are seen in the sky as an Iron Dome anti-missile projectile intercepts a rocket that was fired from Gaza, above the southern Israeli city of Ashkelon May 5, 2019. REUTERS/Ronen Zvulun

Trails are seen in the sky as an Iron Dome anti-missile projectile intercepts a rocket that was fired from Gaza, above the southern Israeli city of Ashkelon May 5, 2019. REUTERS/Amir Cohen

Israelis look on as an Iron Dome anti-missile projectile intercepts a rocket that was fired from Gaza, above the Israeli city of Ashkelon, Israel May 4, 2019 REUTERS/Amir Cohen

Iron Dome anti-missile projectiles intercept rockets that were fired from Gaza, above the Israeli city of Ashkelon, Israel May 4, 2019 REUTERS/Amir Cohen

Chinese workers look on as an Iron Dome anti-missile projectile intercepts a rocket that was fired from Gaza, above the Israeli city of Ashkelon, Israel May 4, 2019 REUTERS/Amir Cohen

Israelis look on as an Iron Dome anti-missile projectile intercepts a rocket that was fired from Gaza, above the Israeli city of Ashkelon, Israel May 4, 2019 REUTERS/Amir Cohen

An Iron Dome anti-missile projectile intercepts a rocket that was fired from Gaza, above the Israeli city of Ashkelon, Israel May 4, 2019 REUTERS/ Amir Cohen

A man watches a television screen showing a news report on North Korea firing several short-range projectiles from its east coast, on a street in Tokyo, Japan May 4, 2019. REUTERS/Kim Kyung-Hoon