"The U.S. military’s entire fleet of F-35 Joint Strike Fighters has been grounded, owing to a crack in the engine of one jet. This is at least the fourth full or partial stand-down of the F-35, the Pentagon’s main future fighter, in just the last two and a half years.
“On Feb. 19, 2013, a routine engine inspection revealed a crack on a low pressure turbine blade of an F135 engine installed in a … test aircraft at Edwards Air Force Base, California,” Kyra Hawn, a program spokeswoman, wrote in a statement.".................
