The largest gathering of F-35s so far has taken place during an American exercise.
 
Exercise Northern Lighting involved US Navy, Air Force and Air National Guard units.
 
Col. Chad Milne, Wisconsin Air National Guard director of operations said.
"The emphasis this year will be placed on joint integration of 4th and 5th generation aircraft from the Air National Guard, Air Force and Navy. Participating units will be tasked to execute multiple high-end training missions that are designed to prepare pilots for real-world conflict.”