This was no training exercise. Yeh Changti was tortured and held prisoner for nineteen years until he was quietly released by his captors, in 1982. He has been living outside Houston, Texas, ever since. The CIA did not know that Yeh Changti had survived his bailout and apparently did not make any kind of effort to locate him. A second Black Cat pilot named Major Jack Chang would also get shot down in a U-2, in 1965, and was imprisoned alongside Yeh Changti. After their release, the two pilots shared their arduous stories with fellow Black Cat pilot, Hsichun Hua, who had become a general in the Taiwanese air force while the men were in captivity. Neither Yeh Changti nor Major Jack Chang was ever given a medal by the CIA. The shoot-down of the Black Cat U-2 pilots, however, had a major impact on what the CIA and the Air Force would do next at Area 51. Suddenly, the development of drones had become a national security priority, drones being pilotless aircraft that could be flown by remote control.
Drones could accomplish what the U-2 could in terms of bringing home photographic intelligence, but a drone could do it without getting pilots captured or killed. Ideally, drones could perform missions that fell into three distinct categories: dull, dirty, and dangerous. Dull meant long flights during which pilots faced fatigue flying to remote areas of the globe. Dirty included situations where nuclear weapons or biological weapons might be involved. Dangerous meant missions over denied territories such as the Soviet Union, North Korea, and China, where shoot-downs were a political risk. Lockheed secured a contract to develop such an unmanned vehicle in late 1962. After Yeh Changti’s shoot-down, the program got a big boost. Flight-testing of the drone code-named Tagboard would take place at Area 51 and, ironically, getting the Lockheed drone to fly properly was among the first duties assigned to Colonel Slater after he left Taoyuan and was given a new assignment at Area 51.
“Lockheed’s D-21 wasn’t just any old drone, it was the world’s first Mach 3 stealth drone,” says Lockheed physicist Ed Lovick, who worked on the program. “The idea of this drone was a radical one because it would fly at least as fast, if not faster, than the A-12. It had a ram jet engine, which meant it was powered by forced air. The drone could only be launched off an aircraft that was already moving faster than the speed of sound.” The A-12 mother ship was designated M-21, M as in mother, and was modified to include a second seat for the drone launch operator, a flight engineer. The D-21 was the name for the drone, the D standing for daughter. But launching one aircraft from the back of another aircraft at speeds of more than 2,300 mph had its own set of challenges, beginning with how not to have the two aircraft crash into each other during launch. The recovery process of the drone also needed to be fine-tuned. Lovick explains, “The drone, designed to overfly China, would travel on its own flight path taking reconnaissance photographs and then head back out to sea.” The idea was to have the drone drop its photo package, which included the camera, the film, and the radio sensors, by parachute so it could be retrieved by a second aircraft nearby. Once the pallet was secure, the drone would crash into the sea and sink to the ocean floor.
Practicing this process at Area 51 translated into a lot of lost drones. Colonel Slater directed the test missions, which took place in what was called the special operating area, or Yuletide, just north of Groom Lake airspace. Colonel Slater and Frank Murray would follow the M-21/D-21 in chase planes and oversee the subsonic launches of the drone. “They’d launch, and then disappear,” Colonel Slater recalls. Helicopter pilot Charlie Trapp was sent to find them, along with a crew of search-and-rescue parajumpers, called PJs. “First, we’d locate the lost drones. Then I’d lower my parajumpers down on ropes. They’d hook the lost pods to a cargo hook and we’d pull the drones off the mountain that way,” Trapp explains. “Sometimes it got tricky, especially if the drone crash-landed on the top of a mountain ridge. We had some tense times with PJs nearly falling off cliffs.” When Colonel Slater felt the Oxcart and its drone were ready for a Mach 3 test, it was time to add ocean-survival training to the mix. For public safety reasons, the plan was to launch the triplesonic drone off the coast of California in March of 1966 for the first test, and to prepare his pilots, Colonel Slater had them swim laps each day in the Area 51 pool, first in bathing suits and then with their pressure suits on. “We’d hoist the guys up over the water in a pulley and then drop them in the pool. As soon as they hit the water the first time, the pressure suit inflated, so we had to have that fixed,” Slater recalls. When it came time to practice an actual landing in a large body of water, the Agency’s highest-ranking officer on base, Werner Weiss, got the Coast Guard to seal off a large section of Lake Mead, the largest reservoir of water in the United States, located just east of Las Vegas.