Technology, June 10, 1991. p 20-21 “Triangular Recon Aircraft May be Supporting F-117A” AW&ST, June 10, 1991. p 20. William Scott "America's New Secret Aircraft" Popular Mechanics, December 1991. p. 32-5. Gregory T. Pope "Possible Black Aircraft Seen Flying In Formation with F-117As KC-135s." Aviation Week, March 9, 1992. p. 66–67 Popular Science, March 1993 "Stealth Watchers" Wired, Issue 2.02 February 1994. Phil Patton (article) Google Patent Search, patent Des. 244,265, issued May 10, 1977 (description) NBC Nightly News, August 6, 1997 segment showing U-2 with triangle on undercarriage (CIA, USAF) External links UAP In the UK Air Defence Region Full Text (PDF) TR-3A at Federation of American Scientists Stealth aircraft Unidentified flying objects