Air Force Training on F-35s With Balky Radar

Air Force Training on F-35s With Balky Radar

Mike Fuentes/Bloomberg

A file photo shows Lockheed Martin Corp.'s F-35 Joint Strike Fighter jet during July 2006. The estimated cost for a planned fleet of 2,443 F-35s has climbed 70 percent to $395.7 billion since 2001.