On this day, 62 years ago, on April 3, 1963 (March 10, 1963 in the lunar calendar), China shot down a U.S. unmanned high-altitude reconnaissance aircraft. U.S. unmanned high-altitude reconnaissance aircraft shot down On April 3, 1963, a U.S. unmanned high-altitude reconnaissance aircraft invaded China's airspace and was shot down by the China Air Force. In the mid-1960s, the U.S. government often sent military reconnaissance aircraft to invade the airspace over the mainland of China to spy on military and economic intelligence, seriously endangering China's security.