The sale of AWACS (Airborne Warning and Control System) surveillance planes to Saudi Arabia by the United States administration of President Ronald Reagan was a controversial part of what was then the largest foreign arms sale in US history. (See Arms Industry) The sale saw objections from a majority of Americans, prominent US Senators, the State of Israel and the Israel lobby. The sale included the five E-3 Sentry AWACS aircraft and eight KE-3 refueling aircraft, with spare parts and support, delivered between June 1986 and September 1987.