A case in point is Great Britain had planned on buying the catapult-launch version of the F-35. But rising costs and delays caused Defence Secretary Philip Hammond to switch to another version.
On the In Depth show blog, you can listen to the interviews, find more information about the guests on the show each day and links to additional resources.
The Defense Department estimates its major acquisition programs are costing $1.6 trillion, slightly less than previously estimates.
The Pentagon wants to rewrite the contract terms with Lockheed Martin over the F-35 fighter jet in the middle of the deal.
The Navy says its F-35C is different from the F-35A and B because of larger wing surfaces and reinforced landing gear, to hold up under the strain of catapult launches and short landings on aircraft carriers.
The Air Force, Navy and Lockheed Martin are pushing for training to begin on the new F-35 Joint Fight Strike Fighter, despite recommendations to postpone training by 10 months.
Winslow Wheeler is the director at the Straus Military Reform Project for the Center for Defense Information.
Congress stopped funding for the engine in this year\'s Continuing Resolution, but the House added the engine to the 2012 bill.
The Navy has awarded Pratt & Whitney\'s Military Engines division a modification to nearly one billion dollars in contracts for F-35 Joint Strike Force fighter engines.
The Pentagon has been telling Congress for years it doesn\'t want the F136 alternative engine for the F35 fighter jet, because it costs too much money.
After weeks of being grounded the three late model F-35 Lighting II Joint Strike Fighter test jets have been cleared to fly.
Flight testing of F-35 Lightning II Joint Strike Fighters has been suspended after an Air Force aircraft experienced a dual generator failure and oil leak during a test sortie.
BAE Systems has signed a $3.8 million contract to continue supplying the secure operating system that runs the F-35 Joint Strike Fighter\'s mission-planning software.
Aviation Week reports the target price for the jet is $109.4 - $142 million per plane.
Is it the little-engine-that-could, or a zombie that can\'t be killed? The controversial alternative engine for the F-35 fighter jet is back in the news.