Hard to believe as it might be, a central and critical software system of the F-35 Joint Strike Fighter simply doesn't work. And that's making people who maintain and certify the readiness of the expensive jet a little crazy. Federal Drive with Tom Temin got the latest from Diana Maurer, the director of Defense Capabilities and Management issues at the Government Accountability Office.\nLearn more about your ad choices. Visit megaphone.fm/adchoices