A Kamov Ka-52 Alligator military helicopter takes part in a military aviation competition in Russia's Krasnodar region on March 28, 2019. (VITALY TIMKIV/AFP/Getty Images)
An Australian Army Lighter amphibious resupply cargo (LARC) vehicle carrying army personnel takes part in training exercise in the Sri Lankan capital Colombo on March 26, 2019. - Some 1,000 Australian security personnel in four naval ships and a military aircraft are participating in the biggest joint exercise yet with their Sri Lankan counterparts. (ISHARA S. KODIKARA/AFP/Getty Images)
In this photo provided by South Korea Defense Acquisition Program Administration, a U.S. F-35A fighter jet lands at Chungju Air Base on March 29, 2019 in Chungju, South Korea. Two F35-A fighter jets have been received by South Korea after the United States approved a plan to export Lockheed Martin's latest F-35 jets to South Korea. South Korea had agreed to buy 40 F-35A stealth jets. (Photo by South Korea Defense Acquisition Program Administration via Getty Images)
In this photo provided by South Korea Defense Acquisition Program Administration, U.S and South Korean soldiers pose with two U.S. F-35A fighter jets at Chungju Air Base on March 29, 2019 in Chungju, South Korea. Two F35-A fighter jets have been received by South Korea after the United States approved a plan to export Lockheed Martin's latest F-35 jets to South Korea. South Korea had agreed to buy 40 F-35A stealth jets. (Photo by South Korea Defense Acquisition Program Administration via Getty Images)
Pakistani army soldiers travel on a vehicle carrying a long-range ballistic Shaheen II missile during the Pakistan Day parade in Islamabad on March 23, 2019. - Pakistan National Day commemorates the passing of the Lahore Resolution, when a separate nation for the Muslims of The British Indian Empire was demanded on March 23, 1940. (Photo by FAROOQ NAEEM / AFP) (Photo credit should read FAROOQ NAEEM/AFP/Getty Images)
A Swedish Gripen jet (L) and a Finnish F-18 Hornet take part in joint exercises between the two air forces over the Arctic Circle towns of Jokkmokk in Sweden and Rovaniemi in Finland on March 25, 2019. - The Airforce Exercise 2019 takes place from March 22 to 27, and missions are flown on a 24/7 basis. (Photo by Jonathan NACKSTRAND / AFP) (Photo credit should read JONATHAN NACKSTRAND/AFP/Getty Images)
TOPSHOT - Fire and smoke billow above buildings in Gaza City during reported Israeli strikes on March 25, 2019. - Israel's military launched strikes on Hamas targets in the Gaza Strip today, the army and witnesses said, hours after a rocket from the Palestinian enclave hit a house and wounded seven Israelis. (Photo by Mahmud Hams / AFP) (Photo credit should read MAHMUD HAMS/AFP/Getty Images)
A member of the Israeli security forces runs next to a military jeep set on fire by Molotov cocktails launched by Palestinian protesters during a demonstration on the outskirts of Ramallah in the occupied West Bank on March 27, 2019, in support of Palestinian prisoners held in Israeli jails. (ABBAS MOMANI/AFP/Getty Images)
HMS Defender makes it way up the river Clyde past Dumbarton Castle on March 22, 2019 in Glasgow, Scotland. The Clyde built Type 45 destroyer is returning to her affiliated city for the first time since 2013. (Photo by Jeff J Mitchell/Getty Images)
Russian Su-25 assault aircrafts take part in a military aviation competition in Russia's Krasnodar region on March 28, 2019. (VITALIY TIMKIV/AFP/Getty Images)
French Army soldiers of Operation Sentinelle patrol around the Eiffel Tower during Act 19 of Gilets Jaunes or ‘Yellow Vest’ protests on March 23, 2019 in Paris, France. After last week’s violent protests on the Champs-Elysees, the Minister of the Interior, Christophe Castaner announced zero tolerance in a bid to avoid a repeat, banning protests on the Champs Elysees and mobilizing the Army’s Sentinelle anti-terrorist unit, in an unprecedented mobilization of the army in France since the Algerian war. (Photo by Kiran Ridley/Getty Images)