classified, THAAD missiles have an estimated range of 125 miles (200 km), and can reach an altitude of 93 miles (150 km). A THAAD battery consists of at least six launcher vehicles, each equipped with eight missiles, with two mobile tactical operations centers (TOCs) and the AN/TPY-2 ground-based radar (GBR); the U.S. Army plans to field at least six THAAD batteries, at a purchase cost of US$800 million per battery. By September 2018 MDA plans to deliver 52 more interceptors to the Army. In June 2020 the Senate Armed Services Committee draft of the FY2021 DoD budget allocated funding for the eighth THAAD battery. The THAAD missile is manufactured at a Lockheed Martin facility near Troy, Alabama. The facility performs final integration, assembly and testing of the THAAD missile. The THAAD Radar is an X-Band active electronically scanned array Radar developed and built by Raytheon at its Andover, Massachusetts Integrated Air Defense Facility. The THAAD radar and a variant developed as a forward sensor for ICBM missile defense, the Forward-Based X-Band – Transportable (FBX-T) radar, were assigned a common designator, AN/TPY-2, in late 2006/early 2007. The THAAD radar can interoperate with Aegis and Patriot systems, in a 3-layer antimissile defense. First units equipped (FUE) On 28 May 2008, the U.S. Army activated Alpha Battery, 4th Air Defense Artillery Regiment (A-4), 11th Air Defense Artillery Brigade at Fort Bliss, Texas. Battery A-4 is part of the 32nd Army Air & Missile Defense Command. At the time, the battery had 24 THAAD interceptors, three THAAD launchers based on the M1120 HEMTT Load Handling System, a THAAD Fire Control and a THAAD radar. Full fielding began in 2009. On 16 October 2009, the U.S. Army and the Missile Defense Agency activated the second Terminal High Altitude Area Defense Battery, Alpha Battery, 2nd Air Defense Artillery Regiment (A-2), at Fort Bliss. On 15 August 2012, Lockheed received a $150 million contract from the Missile Defense Agency (MDA) to produce THAAD Weapon System launchers and fire control and communications equipment for the U.S. Army. The contract included 12 launchers, two fire control and communications units, and support equipment. The contract provided six launchers for THAAD Battery 5 and an additional three launchers each to Batteries 1 and 2. These deliveries will bring all batteries to the standard six launcher configuration. General missile defense plans In May 2017, the Pentagon proposed spending $7.9 billion in its