The Lockheed Martin F-35B Lightning II is a stealth multirole fighter aircraft that can take off and land vertically using a powerful tilting engine (VTOL/VSTOL). It has advantages over other aircraft in that it can operate from aircraft carriers and remote locations without runways. The United States, United Kingdom, Italy, and others are procuring the F-35B to replace aging Harrier and Hornet aircraft. The F-35B is currently in production and initial testing.