The Ballistic Missile Defense System (BMDS) UEWR (Upgraded Early Warning Radars) radars compose large, fixed-site, phased-array radar complexes originally developed for detection and early warning of Soviet strategic submarine launched ballistic missile (SLBM) attacks against the United States. They have been known by several designations, including AN/FPS- 115/120/123(V)/126 and Pave Paws and BMEWS (Ballistic Missile Early Warning System). There are currently two FPS-123(V)3 Pave Paws UEWR sites in the United States (on perimeter coastlines on Cape Cod and at Beale AFB, CA), and three FPS-120 (was FPS-115) BMEWS UEWR sites, in Alaska (Clear), Greenland (Thule), and the UK (Fylingdales). Pave Paws and BMEWS radars have now been upgraded for the BMD System (BMDS), and will be a major component of future BMD systems. Continuing upgrades are currently underway and very well-funded.