JSF Worries.

Military plane manufacturer Pratt & Whitney Corp. halted testing of the engine it designed for the short takeoff/vertical landing version of the F-35 Joint Strike Fighter, while partner Lockheed Martin Corp. juggled its management team. Senior U.S. Air Force officials are keeping up the pressure to stay with the F-35 program, however, by arguing that these new aircraft will allow them to reduce the Air Force's size. "I predict that we will be significantly smaller in the next 20 years than we are today but with the same capability or better," says Hal Homburg, chief of U.S. Air Combat Command.