The US military ordered more than $1 billion worth of new jet engines for the F-35 Lightning II Joint Strike Fighter. "Pratt & Whitney Military Engines is being awarded a $1,038,074,689 modification to the previously awarded advance acquisition contract for the Lot IX low-rate initial production F-35 Lightning II Propulsion contract for the Air Force, Navy/Marine Corps, international partners and foreign military sales (FMS) customers," the US DoD said on April 11.