In 1982 the U.S. introduced the air-launched cruise missile (ALCM) that housed a W80-1 warhead, both of which are now well past their planned lives. To maintain this vital deterrent capability, the Department of Defense (DOD) is working to replace the ALCM through the Long Range Standoff (LRSO) program. In close coordination with DOD, the NNSA is life extending the W80-1 through the W80-4 Life Extension Program (LEP) for use in the LRSO.