Area 51 providers (including Russian providers and the IKONOS) are commercially available. These show the runway markings, base facilities, aircraft, and vehicles. When documents that mention the Nevada Test Site (NTS) and operations at Groom are declassified, mentions of Area 51 and Groom Lake are routinely redacted. One exception is a 1967 memo from CIA director Richard Helms regarding the deployment of three OXCART aircraft from Groom to Kadena Air Base to perform reconnaissance over North Vietnam. Although most mentions of OXCART's home base are redacted in this document, as is a map showing the aircraft's route from there to Okinawa, the
Area 51 redactor appears to have missed one mention: page 15 (page 17 in the PDF), section No. 2 ends "Three OXCART aircraft and the necessary task force personnel will be deployed from Area 51 to Kadena." On 25 June 2013, CIA released an official history of the U-2 and OXCART projects that officially acknowledged the existence of Area 51. The release was in response to a Freedom of Information Act request submitted in 2005 by Jeffrey T. Richelson of George Washington University's National Security Archive, and contain numerous references to Area 51 and Groom Lake, along with a map of the