Soldiers observe an AH-64E Apache attack helicopter during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

A soldier refuels an AH-64E Apache attack helicopter before take off during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

A soldier gives the "Ok" sign before an AH-64E Apache attack helicopter takes off during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

A soldier loads training rockets into a pod on an AH-64E Apache attack helicopter during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

Soldiers load training rockets into a pod on an AH-64E Apache attack helicopter during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

A soldier loads training rockets into a pod on an AH-64E Apache attack helicopter during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

An AH-64E Apache attack helicopter lands during 'Combat Readiness Week' drills in Hsinchu, Taiwan, October 29, 2020. REUTERS/Ann Wang

Indian Air Force (IAF) Mi35 Apache helicopters perform in the air during the 88th Air Force Day parade at Hindon Air Force Station in Ghaziabad, India, October 8, 2020. REUTERS/Anushree Fadnavis

An Indian Air Force's Apache helicopter is seen in the Ladakh region, September 17, 2020. REUTERS/Danish Siddiqui

AH-64 Apache helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH-64 Apache helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH-64 Apache helicopters fly to location during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

AH-64 Apache helicopters fires during the live-fire, anti-landing Han Kuang military exercise, which simulates an enemy invasion, in Taichung, Taiwan July 16, 2020. REUTERS/Ann Wang

U.S. Army Apache helicopter flies near the U.S. Embassy and a poster of Qais al-Khazali, leader of the militant group Asaib Ahl al-Haq, hanged on a buliding, during a protest to condemn air strikes on bases belonging to Hashd al-Shaabi (paramilitary forces), outside the U.S. Embassy in Baghdad, Iraq January 1, 2020. REUTERS/Thaier al-Sudani

U.S. Army Apache helicopter flies near by the U.S. Embassy and a poster of Qais al-Khazali, leader of the militant group Asaib Ahl al-Haq, being hanged on a buliding during a protest to condemn air strikes on bases belonging to Hashd al-Shaabi (paramilitary forces), outside the U.S. Embassy in Baghdad, Iraq January 1, 2020. REUTERS/Thaier al-Sudani

U.S. Army Apache helicopter flies over the U.S. Embassy during a protest to condemn air strikes on bases belonging to Hashd al-Shaabi (paramilitary forces), outside the U.S. Embassy in Baghdad, Iraq January 1, 2020. REUTERS/Thaier al-Sudani

A U.S. Navy midshipman takes a pictures of overpassing Apache helicopters during halftime of the annual Army-Navy collegiate football game at Lincoln Financial Field, in Philadelphia, Pennsylvania, U.S., December 14, 2019. REUTERS/Tom Brenner

AH-64 Apache helicopters fire during the live fire Han Kuang military exercise, which simulates China's People's Liberation Army (PLA) invading the island, in Pingtung, Taiwan May 30, 2019. REUTERS/Tyrone Siu

An AH-64 Apache helicopter releases flares during the live fire Han Kuang military exercise, which simulates China's People's Liberation Army (PLA) invading the island, in Pingtung, Taiwan May 30, 2019. REUTERS/Tyrone Siu

An Israeli Apache helicopter releases flares as it flies over the Gaza Strip March 25, 2019. REUTERS/Mohammed Salem

Israeli Air Force Apache helicopter fires during an aerial demonstration at a graduation ceremony for Israeli air force pilots at the Hatzerim air base in southern Israel December 26, 2018. REUTERS/Amir Cohen

Israeli Apache helicopters fly over the border between Israel and the Gaza Strip, as it is seen from the Israeli side of the border November 13, 2018 REUTERS/Amir Cohen

A South Korean army Apache helicopter fires missiles during a demonstration at a media event of 2018 Defense Expo Korea near the demilitarized zone separating the two Koreas in Pocheon, South Korea, September 11, 2018. REUTERS/Kim Hong-Ji

South Korean army Apache helicopters fly during a demonstration at a media event of 2018 Defense Expo Korea near the demilitarized zone separating the two Koreas in Pocheon, South Korea, September 11, 2018. REUTERS/Kim Hong-Ji

South Korean army Apache helicopters fly during a demonstration at a media event of 2018 Defense Expo Korea near the demilitarized zone separating the two Koreas in Pocheon, South Korea, September 11, 2018. REUTERS/Kim Hong-Ji

AH-64 Apache helicopters fly during a closing ceremony of the NATO-led military exercises "Noble Partner 2018" at Vaziani military base outside Tbilisi, Georgia August 15, 2018. REUTERS/Irakli Gedenidze

AH-64 Apache helicopter fires flares during Han Kuang military drill simulating the China's People's Liberation Army (PLA) invading the island, at Ching Chuan Kang Air Base, in Taichung, Taiwan June 7, 2018. REUTERS/Tyrone Siu TPX IMAGES OF THE DAY

AH-64 Apache helicopter fires flares during Han Kuang military drill simulating the China's People's Liberation Army (PLA) invading the island, at Ching Chuan Kang Air Base, in Taichung, Taiwan June 7, 2018. REUTERS/Tyrone Siu

Crew stand next to an Apache helicopter during a media availability to show the 3 Regiment Army Air Corps preparing for the forthcoming royal wedding between Prince Harry and Meghan Markle, at Wattisham Airfield, Britain May 10, 2018. Aaron Chown/Pool via Reuters

Craftsman Dekin a Royal Electrical Engineer of 3 Regiment Army Air Corps stands in front of an Apache Helicopter during a media availability to show their preparations for the forthcoming royal wedding between Prince Harry and Meghan Markle, at Wattisham Airfield, Britain May 10, 2018. Aaron Chown/Pool via Reuters

An Apache helicopter flies during a media availability to show the 3 Regiment Army Air Corps preparing for the forthcoming royal wedding between Prince Harry and Meghan Markle, at Wattisham Airfield, Britain May 10, 2018. Aaron Chown/Pool via Reuters

Britain's Prince Harry poses for a photograph in front of an apache helicopter with the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. Heathcliff O'Malley/Pool via Reuters TPX IMAGES OF THE DAY

Britain's Prince Harry poses for a photograph in front of an apache helicopter with the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. Heathcliff O'Malley/Pool via Reuters

Britain's Prince Harry poses for a photograph in front of an apache helicopter with the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. Heathcliff O'Malley/Pool via Reuters

Britain's Prince Harry poses for a photograph in front of an apache helicopter with the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. Heathcliff O'Malley/Pool via Reuters

Britain's Prince Harry poses for a photograph in front of an apache helicopter with the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. Heathcliff O'Malley/Pool via Reuters

Britain's Prince Harry watches a flypast in front of an apache helicopter with the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. Heathcliff O'Malley/Pool via Reuters

Britain's Prince Harry poses for a photograph in front of an apache helicopter with some of the latest graduates who have received their Wings at the Army Aviation Centre in Middle Wallop, Britain, March 16, 2018. REUTERS/Hannah McKay

U.S. soldiers present a AH-64D Apache military helicopter by Boeing at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

U.S. soldier presents a military AH-64D Apache helicopter by Boeing at an international military fair in Kielce, Poland September 7, 2017. REUTERS/Kacper Pempel

South Korean Foreign Minister Kang Kyung-wha sits in a AH-64D Apache Longbow helicopter as as she visits the headquarters of the South Korea-US Combined 2nd Infantry Division at the Camp Red Cloud in Uijeongbu, South Korea June 25, 2017. REUTERS/Chung Sung-Jun/Pool *** Local Caption *** Kang Kyung-wha

South Korean Foreign Minister Kang Kyung-wha sits in a AH-64D Apache Longbow helicopter as as she visits the headquarters of the South Korea-US Combined 2nd Infantry Division at the Camp Red Cloud in Uijeongbu, South Korea June 25, 2017. REUTERS/Chung Sung-Jun/Pool *** Local Caption *** Kang Kyung-wha

South Korean Foreign Minister Kang Kyung-wha talks with Lieutenant General Thomas Vandal, commander of the US 8th Army, while sitting in a AH-64D Apache Longbow helicopter as she visits the headquarters of the South Korea-US Combined 2nd Infantry Division at the Camp Red Cloud in Uijeongbu, South Korea June 25, 2017. REUTERS/Chung Sung-Jun/Pool *** Local Caption *** Kang Kyung-wha

AH-64E Apache and AH-1W Super Cobra attack helicopters take part during annual Han Kuang military drill in Penghu, Taiwan May 25, 2017. REUTERS/Tyrone Siu

AH-64E Apache attack helicopters releases flares during annual Han Kuang military drill in Penghu, Taiwan May 25, 2017. REUTERS/Tyrone Siu

AH-64E Apache attack helicopters releases flares during annual Han Kuang military drill in Penghu, Taiwan May 25, 2017. REUTERS/Tyrone Siu

A U.S. Army's AH-64 Apache helicopter flies over amoured vehicles, during a U.S.-South Korea joint live-fire military exercise, at a training field, near the demilitarized zone, separating the two Koreas in Pocheon, South Korea April 21, 2017. Picture taken on April 21, 2017. REUTERS/Kim Hong-Ji

U.S. Army's AH-64 Apache helicopters fire, during a U.S.-South Korea joint live-fire military exercise, at a training field, near the demilitarized zone, separating the two Koreas in Pocheon, South Korea April 21, 2017. Picture taken on April 21, 2017. REUTERS/Kim Hong-Ji

An Israeli Apache helicopter fires at a target during an aerial demonstration at a graduation ceremony for Israeli airforce pilots at the Hatzerim air base in southern Israel December 29, 2016. REUTERS/Amir Cohen

An AH-64E Apache attack helicopter takes part in an annual Han Kuang military drill simulating the China's People's Liberation Army (PLA) invading the island, in Pingtung county, southern Taiwan August 25, 2016. REUTERS/Tyrone Siu

Israeli Prime Minister Benjamin Netanyahu (C) sits inside an Apache Helicopter and speaks to Chief of the Israeli Air Force Major-General Amir Eshel (L) during his visit to the Tel Nof airforce base in southern Israel August 17, 2016. REUTERS/Amir Cohen

Israeli Prime Minister Benjamin Netanyahu (C) sits inside an Apache Helicopter next to Chief of the Israeli Air Force Major-General Amir Eshel (L) during his visit to the Tel Nof airforce base in southern Israel August 17, 2016. REUTERS/Amir Cohen

An Israeli Apache helicopter (top) fires at a target which is burning as a Sikorsky CH-53 helicopter (C) flies by, during an aerial demonstration at a graduation ceremony for Israeli airforce pilots at the Hatzerim air base in southern Israel June 30, 2016. REUTERS/Amir Cohen

A U.S. Apache helicopter fires as it takes part in the "Saber Strike" NATO military exercise in Adazi, Latvia, June 13, 2016. REUTERS/Ints Kalnins

A U.S. Apache helicopter fires as it takes part in the "Saber Strike" NATO military exercise in Adazi, Latvia, June 13, 2016. REUTERS/Ints Kalnins

A Republic of Singapore Air Force (RSAF) F-15SG fighter aircraft performs a maneuver as it flies past an RSAF AH-64D Apache helicopter during an aerial display at the Singapore Airshow at Changi Exhibition Center February 17, 2016. REUTERS/Edgar Su

A Republic of Singapore Air Force (RSAF) F-15SG fighter aircraft performs a maneuver as it flies past an RSAF AH-64D Apache helicopter in an aerial display during the opening day of the Singapore Airshow at Changi Exhibition Center February 16, 2016. REUTERS/Edgar Su

A Republic of Singapore Air Force (RSAF) F-15SG fighter aircraft performs a maneuver as it flies past an RSAF AH-64D Apache helicopter during a preview of the Singapore Airshow at Changi exhibition center in Singapore February 14, 2016. The airshow will take place from February 16-21. REUTERS/Edgar Su

A Republic of Singapore Air Force (RSAF) F-15SG fighter aircraft performs a maneuver as it flies past an RSAF AH-64D Apache helicopter during a preview of the Singapore Airshow at Changi exhibition center in Singapore February 14, 2016. The airshow will take place from February 16-21. REUTERS/Edgar Su

An Israeli Apache helicopter flies through smoke after firing at a target, which is burning, during an aerial demonstration at a graduation ceremony for Israeli airforce pilots at the Hatzerim air base in southern Israel December 31, 2015. REUTERS/Baz Ratner