The missiles come out of nowhere, flattening hangars, fuel dumps and barracks. It's a worst-case scenario. But it's one Australia is practising for with the United States. Joint exercise Cope North 2021 began on the remote Pacific island of Guam last week. It ends on February 19. It's a yearly event that brings together the United States, Japan and Australia in cooperative training for humanitarian relief and combat. This year, the controversial F-35A Lightning II strike fighter will take part. .@PACAF Airmen conduct a group flight line engagement during exercise #CopeNorth 2021 at @AndersenAFBGuam, Guam. pic.twitter.com/lK9f6aAQYOâ U.S. Indo-Pacific Command (@INDOPACOM) February 6, 2021