Naval Air Station Pensacola or NAS Pensacola (formerly NAS/KNAS until changed circa 1970 to allow Nassau International Airport, now Lynden Pindling International Airport, to have IATA code NAS), "The Cradle of Naval Aviation", is a United States Navy base located next to Warrington, Florida, a community southwest of the Pensacola city limits. It is best known as the initial primary training base for all U.S. Navy, Marine Corps and Coast Guard officers pursuing designation as naval aviators and naval flight officers, the advanced training base for most naval flight officers, and as the home base for the United States Navy Flight Demonstration Squadron, the precision-flying team known as the Blue Angels. Because of contamination by heavy metals and other hazardous materials during its history, it is designated as a Superfund site needing environmental cleanup. The air station also hosts the Naval Education and Training Command (NETC) and the Naval Aerospace Medical Institute (NAMI), the latter of which provides training for all naval flight surgeons, aviation physiologists, and aerospace experimental psychologists. With the closure of Naval Air Station Memphis in Millington, Tennessee, and the transition of that facility to Naval Support Activity Mid-South, NAS Pensacola also became home to the Naval Air Technical Training Center (NATTC) Memphis, which relocated to Pensacola and was renamed NATTC Pensacola. NATTC provides technical training schools for nearly all enlisted aircraft maintenance and enlisted aircrew specialties in the U.S. Navy, U.S. Marine Corps and U.S. Coast Guard. The NATTC facility at NAS Pensacola is also home to the USAF Detachment 1, a geographically separated unit (GSU) whose home unit is the 359th Training Squadron located at nearby Eglin AFB. Detachment 1 trains over 1,100 airmen annually in three structural maintenance disciplines: low observable, non-destructive inspection, and aircraft structural maintenance. NAS Pensacola contains Forrest Sherman Field, home of Training Air Wing SIX (TRAWING 6), providing undergraduate flight training for all prospective naval flight officers for the U.S. Navy and U.S. Marine Corps, and flight officers/navigators for other NATO/Allied/Coalition partners. TRAWING SIX consists of the Training Squadron 4 (VT-4) "Warbucks", Training Squadron 10 (VT-10) "Wildcats" and Training Squadron 86 (VT-86) "Sabrehawks," flying the T-45C Goshawk and T-6A Texan II. A select number of prospective U.S. Air Force navigator/combat systems officers, destined for certain fighter/bomber or heavy aircraft, were previously trained via TRAWING SIX, under VT-4 or VT-10, with command of VT-10 rotating periodically to a USAF officer. This