Cuban Missile Crisis into Cuba. On October 13, Dobrynin was questioned by former Undersecretary of State Chester Bowles about whether the Soviets planned to put offensive weapons in Cuba. He denied any such plans. On October 17, Soviet embassy official Georgy Bolshakov brought President Kennedy a personal message from Khrushchev reassuring him that "under no circumstances would surface-to-surface missiles be sent to Cuba." As early as August 1962, the US suspected the Soviets of building missile facilities in Cuba. During that month, its intelligence services gathered information about sightings by ground observers of Russian-built MiG-21 fighters and Il-28 light bombers. U-2 spyplanes found
US signals intelligence in the Cold War when compromised, by Ronald Pelton, in 1981. SIGINT had much operational impact during this period, with the Cuban Missile Crisis, steady ramping up of warfare in Southeast Asia, and US domestic surveillance. Aircraft, UAV, ship, and ground SIGINT all were in use, and satellite technology left the experimental stage. The Ryan Q-2A evolved into the Q-2C Firebee target drone of 1960 which remains in active service. In 1961, the Air Force requested a reconnaissance version of the Firebee then designated the BQM-34A which resulted in the Ryan Model 147 (later to be designated AQM-34 by USAF). This RPV (Remotely Piloted