The Air Force has approved a new, $5.2 billion lifecycle cost estimate for the F-15 Eagle Passive Active Warning Survivability System -- a $2 billion increase that reflects the Air Force's decision to buy 144 additional systems for the new F-15EX even as the program faces significant fielding delays due to an unexpected component redesign. The F-15 program office confirmed in a recent email to Inside Defense that the service updated the EPAWSS cost estimate as part of a...