Code name policy of assigning code names intended to give no such clues to the uninitiated. For example, the British counter measures against the V-2 was called "Operation Crossbow". The atomic bomb project centered in New Mexico was called the Manhattan Project, derived from the Manhattan Engineer District which managed the program. The code name for the American A-12 / SR-71 spy plane project, producing the fastest, highest-flying aircraft in the world, was "Oxcart". The American group that planned that country's first ICBM was called the Teapot Committee. Although the word could stand for a menace to shipping (in this case, that
Trinity (nuclear test) release is comparable with that contemplated for final use." In March 1944, he obtained Groves's tentative approval for testing a full-scale explosion inside a containment vessel, although Groves was still worried about how he would explain the loss of a billion dollars worth of plutonium to a Senate Committee in the event of a failure. The exact origin of the code name "Trinity" for the test is unknown, but it is often attributed to Oppenheimer as a reference to the poetry of John Donne, which in turn references the Christian notion of the Trinity (three-fold nature of God). In 1962,