up to Mach 5 at an altitude of . The CIA decided that the extra performance would not be enough to protect it from missile systems already capable of attacking the A-12, and nothing came of the project. The concept of spoofing radars through their blip/scan was ultimately ineffective. Among other issues, it was discovered that the engine exhaust produced significant reflections. Lockheed proposed adding cesium to the jet fuel to generate a cloud of ions that would help mask them. In addition, since the spoofing relied on deficiencies in the radar display systems, upgrading them could render the entire concept moot. In the end, the A-12 was considered vulnerable and was only flown over secondary foes like Vietnam. The failure of the A-12's attempts to avoid radar was demonstrated when the Vietnamese proved able to track the A-12 with some ease, firing on several of them and causing minor damage on one occasion in 1967. See also References Notes Bibliography Johnson, Clarence L. "History of the OXCART Program." Burbank, California: Lockheed Aircraft Corporation Advanced Development Projects, SP-1362, 1 July 1968. "KINGFISH Summary Report." Fort Worth, Texas: Convair, PF-0-104M, 1959. Lovick, Edward, Jr. Radar Man: A Personal History of Stealth. New York: iUniverse, 2010. . McIninch, Thomas. "The Oxcart Story." Studies in Intelligence, Issue 15, Winter 1971 (Released: 6 May 2007). Retrieved: 10 July 2009. Merlin, Peter W. From Archangel to Senior Crown: Design and Development of the Blackbird. Reston, Virginia: American Institute of Aeronautics and Astronautics (AIAA), 2008. . Pedlow, Gregory W. and Welzenbach, Donald E. "Chapter 6: The U-2's Intended Successor: Project Oxcart, 1956-1968." The Central Intelligence Agency and Overhead Reconnaissance: The U-2 and OXCART Programs, 1954 - 1974. Washington, D.C.: Central Intelligence Agency, 1992. Retrieved: 2 April 2009. Scott, Jeff. "Convair Super Hustler, Fish & Kingfish." Aerospaceweb Question of the Week, 31 December 2006. Suhler, Paul A. From RAINBOW to GUSTO: Stealth and the Design of the Lockheed Blackbird. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2009. . "Super Hustler: A New Approach to the Manned Strategic Bombing-Reconnaissance Problem." Fort Worth, Texas: Convair, FMZ-1200-20, 26 May 1958. "Super Hustler SRD-17: TAC Bomber Studies." Fort Worth, Texas: Convair, FZM-1556B, 27 April 1960. External links Hehs, Eric: Super Hustler, FISH, Kingfish, And Beyond codeonemagazine.com. (Part 1: Super Hustler) - (Part 2: FISH) - (Part 3: Kingfish) - (Part 4: Beyond Kingfish) Kingfish Stealth aircraft Cancelled military aircraft projects