In 1960, Ayub Khan granted permission for the United States to fly its first spy missions to the Soviet Union from the Peshawar Air Base, which had been recently upgraded with American funds. In May 1960, the U-2 incident took place, in which pilot Gary Powers was captured by the USSR. The CIA notified Ayub Khan of the incident while he was in London for a state visit: he reportedly shrugged his shoulders and stated that he had expected such an incident would eventually happen.