The F-35 Joint Program Office has grounded a portion of the fleet following a mishap that occurred at Forth Worth on December 15. This is the second grounding action for the F-35 inventory this year.This episode also features exclusive images of the Fort Worth crash taken by aviation photographer Michael Keaveney, a U.S. Army veteran written more than a dozen aviation articles and provided a variety of military photographs that have haven been published in Combat Aircraft, Air Forces Monthly and Air International magazines.