12/12/2013: A Marine F-35B Lightning II breaks left out of a formation flight with United Kingdom F-35B aircraft over Eglin Air Force Base, Fla., Dec. 4.
The joint-program reached a new single-day record for F-35 sorties Dec. 4 with 45 training missions between all three models of the aircraft.
The Marine B-model completed 32 of the flights, the Air Force A-model had 10 flights and the Navy C-model flew three missions.
The photos show the USMC and UK F-35Bs flying in joint training.
(Courtesy photo/Andy Poulastides)