A U.S. Air Force F-35 Lightning II assigned to Eglin Air Force Base, Fla., takes off during ATLANTIC TRIDENT 17 at Joint Base Langley-Eustis, Va., April 20, 2017. The exercise simulates a highly-contested and operationally-limited environment where U.S. and partner pilots, along with their ground crews, can test their readiness. (U.S. Air Force Photo/Airman 1st Class Tristan Biese)