Lockheed A-12 (60-6924, Article 121). A single seat reconnaissance aircraft developed and operated under Project Oxcart. The A-12 had a maximum speed of Mach 3.35 and service ceiling of 85,000ft. Article 121 the first A-12 built, first took to the air on 30th April 1962, flown by Lockheed's chief test pilot Louis Schalk.

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