The Pentagon plans to purchase another F-35B ground article for durability testing because the current equipment is no longer considered production representative, according to the F-35 joint program office. The program office has completed second lifetime testing on the F-35B short-take-off-and-vertical-landing durability article. However, during the testing there were "significant and multiple findings" in the wing carry-through component of the airframe, F-35 spokesman Joe DellaVedova wrote in a May 12 statement to Inside the Navy . "Because the current test...