FORT WORTH, Texas, Jan. 6 (UPI) -- Lockheed Martin executives say critics of the new F-35 Joint Strike Fighter still don't see the need for multi-role warplanes in U.S. military doctrine.

FORT WORTH, Texas, Aug. 1 (UPI) -- Lockheed Martin says it will begin production of the F-35B short takeoff/vertical landing aircraft after meeting U.S. Defense Department requirements.

FORT WORTH, Texas, May 1 (UPI) -- Lockheed Martin test-fired the engine for its F-35B Lightning II Joint Strike Fighter for the first time.

FORT WORTH, Texas, April 11 (UPI) -- The Pentagon says the costs of its F-35 Joint Strike Fighter program have dropped by nearly $1 billion.

FORT WORTH, Texas, Jan. 31 (UPI) -- The U.S. Air Force has carried out its first evaluation flight of the Lockheed Martin F-35 Lightning II.

FORT WORTH, Texas, Oct. 26 (UPI) -- The F-35B Lightning II fighter has been powered up for the first time, Lockheed Martin said Friday.