U.S. Marine Corps Lt. Gen. Jon Davis, Deputy Commandant

U.S. Marine Corps Lt. Gen. Jon Davis, Deputy Commandant for Aviation (right), talks with Royal Navy Cmdr. Mark Dellar and Lt. Cmdr. Jim Cobbert, while embarked aboard USS Wasp May 20, 2015, during the first phase of F-35B operational testing (OT-1). Over a two-week period, OT-1 will evaluate the full spectrum of F-35B measures of suitability and effectiveness, as well as the aircraft’s readiness for initial operating capability in July 2015. Data and lessons learned will lay the groundwork for future F-35B deployments aboard U.S. Navy amphibious carriers. Sixteen Royal Navy and Royal Air Force personnel are participating in OT-1 in order to glean experience and take back lessons learned for the UK’s F-35B program. (U.S. Marine Corps photo by Maj. Paul Greenberg)