Jim Eastham, known in aviation circles under the Codename Dutch 52, was a legendary Lockheed test pilot known for flight-testing the world's first three Mach 3+ articles at Area 51, White Sands, NM, and Edwards AFB. He was the first pilot to fly the YF-12A (Project KEYLOCK [sic]), second pilot to fly the SR-71 (Project SENIOR CROWN), third pilot to fly the CIA's A-12 Blackbird (Project OXCART). Jim was the chief test pilot during the testing of the Convair YB-58A, and the author of the YF-12 flight manual.