U.S., joint and coalition military personnel attend a commander’s update brief (CUB) in the Staff Exercise 20-2 Combined Joint Task Force Joint Operations Center at Naval Air Station Keflavik, Iceland, Feb. 11, 2020. The CUB provides the commanding officer of the exercise with the current state of personnel and assets assigned to it. (U.S. Air Force photo by Staff Sgt. Christopher Maldonado)