FILE PHOTO: A Lockheed Martin F-35B stealth fighter is seen on the USS Wasp (LHD 1) amphibious assault carrier off Japan's southernmost island of Okinawa March 23, 2018. REUTERS/Issei Kato

WASHINGTON (Reuters) - Lockheed Martin Corp LMT.N has been awarded a $7 billion modification to a contract providing for 114 F-35 aircraft for the U.S. Air Force, the U.S. Marine Corps, the U.S. Navy, and the governments of Norway, Australia and Italy, the Pentagon said on Monday.