Cost overruns. I feel their pain.
http://www.nytimes.com/2012/11/29/us/in-federal-budget-cutting-f-35-fighter-jet-is-at-risk.html?hp&_r=0 (http://www.nytimes.com/2012/11/29/us/in-federal-budget-cutting-f-35-fighter-jet-is-at-risk.html?hp&_r=0)
That's why I never keep track!
I find the "crash & not burn" method works for me.....
Crash a plane, take out the old electronics and then you don't burn money on new stuff! ;)
My F-35C in the build thread cost about $75...that one stayed on budget. Come to think of it I've started the second version to try to deal with the lack of power and poor slow speed performance, so...
Nothing a couple extra billion dollars can't solve I'm sure!