UK F-35's join USMC/USAF jets at training base.

An F-16 Fighting Falcon provides a safety escort for two F-35 Lightning II pilots Oct. 16, 2012. The aviators delivered two new joint strike fighters to the 33rd Fighter Wing at Eglin Air Force Base, Fla. Following the 90-minute ferry flight, Eglin AFB ground crews received the F-35s to prepare them for pilot and maintainer training and for the United Kingdom to conduct operational tests and evaluations. (U.S. Air Force photo/Maj. Karen Roganov)

U.K. Royal Air Force Sqn. Ldr. Jim Schofield touches down in an F-35 Lightning II at Eglin Air Force Base, Fla., Oct. 19, 2012. This second United Kingdom F-35B at Eglin AFB will be embedded with the Marine Fighter Attack Training Squadron 501. It will be used for pilot and maintainer training and for the United Kingdom to conduct operational tests and evaluations. The F-35 incorporates a wide range of new technologies for stealth, multi-mission capabilities and sustainability. (U.S. Air Force photo/Maj. Karen Roganov)

United Kingdom Royal Air Force and Royal Navy aircraft maintainers met the U.K.'s second F-35B Lightning II as it arrived to Eglin Air Force Base, Fla., Oct. 19, 2012. These maintainers are part of the first class of U.K. maintainers attending courses at the F-35 Academic Training Center here. The U.K. maintenance training began Oct. 1. (U.S. Air Force photo/Maj. Karen Roganov)