Question: The Lockheed A-12 was a reconnaissance aircraft built for which United States organization, by Skunk Works, an official pseudonym for Lockheed Martin's Advanced Development Programs (ADP), formerly called Lockheed Advanced Development Projects?

full_context: Document 1: Lockheed SR-71 Blackbird: The Lockheed SR-71 "Blackbird" is a long-range, Mach 3+ strategic reconnaissance aircraft that was operated by the United States Air Force. It was developed as a black project from the Lockheed A-12 reconnaissance aircraft in the 1960s by Lockheed and its Skunk Works division. American aerospace engineer Clarence "Kelly" Johnson was responsible for many of the design's innovative concepts. During aerial reconnaissance missions, the SR-71 operated at high speeds and altitudes to allow it to outrace threats. If a surface-to-air missile launch was detected, the standard evasive action was simply to accelerate and outfly the missile. The SR-71 was designed with a reduced radar cross-section.
Document 2: Lockheed F-104 Starfighter: The Lockheed F-104 Starfighter is a single-engine, supersonic interceptor aircraft which later became widely used as an attack aircraft. It was originally developed by Lockheed for the United States Air Force (USAF), but became widely used by US Allies around the world, and produced by several other NATO nations. One of the Century Series of fighter aircraft, it was operated by the air forces of more than a dozen nations from 1958 to 2004. Its design team was led by Kelly Johnson, who contributed to the development of the Lockheed P-38 Lightning, Lockheed U-2, Lockheed SR-71 Blackbird and other Lockheed aircraft.
Document 3: Lockheed Martin F-22 Raptor: The Lockheed Martin F-22 Raptor is a fifth-generation, single-seat, twin-engine, all-weather stealth tactical fighter aircraft developed for the United States Air Force (USAF). The result of the USAF's Advanced Tactical Fighter program, the aircraft was designed primarily as an air superiority fighter, but also has ground attack, electronic warfare, and signal intelligence capabilities. The prime contractor, Lockheed Martin, built most of the F-22's airframe and weapons systems and conducted final assembly, while Boeing provided the wings, aft fuselage, avionics integration, and training systems.
Document 4: Skunk Works: Skunk Works is an official pseudonym for Lockheed Martin's Advanced Development Programs (ADP), formerly called Lockheed Advanced Development Projects. It is responsible for a number of famous aircraft designs, including the U-2, the Lockheed SR-71 Blackbird, the Lockheed F-117 Nighthawk, Lockheed Martin F-22 Raptor, and the Lockheed Martin F-35 Lightning II, which will be used in the air forces of several countries. Its name was taken from the moonshine factory in the comic strip "Li'l Abner". The designation "skunk works" or "skunkworks" is widely used in business, engineering, and technical fields to describe a group within an organization given a high degree of autonomy and unhampered by bureaucracy, with the task of working on advanced or secret projects.
Document 5: Lockheed YF-12: The Lockheed YF-12 was an American prototype interceptor aircraft evaluated by the United States Air Force. The YF-12 was a twin-seat version of the secret single-seat Lockheed A-12 reconnaissance aircraft, which led to the U.S. Air Force's Lockheed SR-71 Blackbird twin-seat reconnaissance variant. The YF-12 set and held speed and altitude world records of over 2,000 mph (3,200 km/h) and over 80,000 ft (later surpassed by the SR-71), and is the world's largest manned interceptor to date.
Document 6: Stark Industries: Stark Industries (NYSE: SIA, NASDAQ: STRK, fictional), later also known as Stark International, Stark Innovations, Stark/Fujikawa, Stark Enterprises and Stark Resilient, is a fictional company appearing in American comic books published by Marvel Comics. The company is depicted as being owned and run by businessman Anthony Edward "Tony" Stark, also known as Iron Man. It first appeared in "Tales of Suspense" #40 (April 1963) and was founded by Tony's father, Howard Stark. According to Forbes 25 largest fictional companies it had an estimated sales of $20.3 billion, ranking it at number 16. In the Marvel Cinematic Universe, Stark Industries has a logo similar to that of defense contractors Lockheed Martin and Northrop Grumman and is listed on the New York Stock Exchange as SIA. During the press conference scene, Stark is seen entering a building that resembles the entrance to Lockheed Martin's Skunk Works facility. An airplane extremely similar to the Lockheed YF-22 stood as a statue in front of the Stark Industries facility, exactly like the prototypes on display at Skunk Works facility in Palmdale, California.
Document 7: Lockheed Senior Peg: The Lockheed Senior Peg was an experimental design by the Lockheed Corporation that competed with a design by Northrop (Senior Ice) for a stealth aircraft which would eventually become the Northrop Grumman B-2 Spirit. It was created as part of the Advanced Technology Bomber competition, The competition started in 1979.
Document 8: Northrop YF-23: The Northrop/McDonnell Douglas YF-23 was an American single-seat, twin-engine stealth fighter aircraft technology demonstrator designed for the United States Air Force (USAF). The design was a finalist in the USAF's Advanced Tactical Fighter (ATF) competition, battling the Lockheed YF-22 for a production contract. Two YF-23 prototypes were built, nicknamed "Black Widow II" and "Gray Ghost".
Document 9: Lockheed Martin Polecat: The Lockheed Martin Polecat (company designation P-175) was an unmanned aerial vehicle by Lockheed Martin. It was developed by the company's Advanced Development Programs division in Palmdale, California. "Polecat" is a colloquialism for a skunk, in an apparent reference to the popular "Skunk Works" nickname for the Lockheed Martin's Advanced Development Programs division.
Document 10: Skunkworks: Skunk Works is an official trademark for the Lockheed Martin Advanced Development Programs (formerly Lockheed Advanced Development Projects).
Document 11: Kelly Johnson (engineer): Clarence Leonard "Kelly" Johnson (February 27, 1910 – December 21, 1990) was an American aeronautical and systems engineer. He is recognized for his contributions to a series of important aircraft designs, most notably the Lockheed U-2 and SR-71 Blackbird. Besides the first production aircraft to exceed Mach 3, he also produced the first fighter capable of Mach 2, the United States' first operational jet fighter, as well as the first U.S. fighter to exceed 400 mph, and many other contributions to a large number of aircraft. As a member and first team leader of the Lockheed Skunk Works, Johnson worked for more than four decades and is said to have been an "organizing genius". He played a leading role in the design of over forty aircraft, including several honored with the prestigious Collier Trophy, acquiring a reputation as one of the most talented and prolific aircraft design engineers in the history of aviation. In 2003, as part of its commemoration of the 100th anniversary of the Wright Brothers' flight, "Aviation Week & Space Technology" ranked Johnson 8th on its list of the top 100 "most important, most interesting, and most influential people" in the first century of aerospace. Hall Hibbard, Johnson's Lockheed boss, referring to Johnson's Swedish ancestry once remarked to Ben Rich: "That damned Swede can actually see air."
Document 12: General Dynamics F-16 Fighting Falcon: The General Dynamics F-16 Fighting Falcon is a single-engine supersonic multirole fighter aircraft originally developed by General Dynamics (now Lockheed Martin) for the United States Air Force (USAF). Designed as an air superiority day fighter, it evolved into a successful all-weather multirole aircraft. Over 4,500 aircraft have been built since production was approved in 1976. Although no longer being purchased by the U.S. Air Force, improved versions are still being built for export customers. In 1993, General Dynamics sold its aircraft manufacturing business to the Lockheed Corporation, which in turn became part of Lockheed Martin after a 1995 merger with Martin Marietta.
Document 13: Lockheed Martin Advanced Technology Laboratories: Lockheed Martin Advanced Technology Laboratories (ATL) is a department of Lockheed Martin, located in Cherry Hill, New Jersey, with approximately 220 employees. Other locations include Westlake Village, California, Atlanta, Georgia, and Arlington, Virginia. ATL specializes in advanced research and development and is analogous to the Lockheed Martin Aeronautics division's famous Skunk Works.
Document 14: Lockheed A-12: The Lockheed A-12 was a reconnaissance aircraft built for the United States Central Intelligence Agency (CIA) by Lockheed's Skunk Works, based on the designs of Clarence "Kelly" Johnson. The aircraft was designated A-12, the 12th in a series of internal design efforts for "Archangel", the aircraft's internal code name. It competed in the CIA's "Oxcart" program against the Convair Kingfish proposal in 1959, and won for a variety of reasons.
Document 15: Lockheed Martin Advanced Technology Labs: Lockheed Martin Advanced Technology Laboratories is a department of Lockheed Martin, in the Electronic Systems business unit, located in Cherry Hill, NJ, with approximately 400 employees. Other locations include Westlake Village, CA, Atlanta, GA, Arlington, VA, and Vienna, VA. ATL specializes in advanced research and development and is analogous to the Lockheed Martin Aeronautics division's famous Skunk Works.
ground_truth: Central Intelligence Agency (CIA)