After the terrorist attack at the 1972 Summer Olympics, the significant financial debts of Montreal (1976), and various boycotts by National Olympic Committees, few cities by the late 1970s were willing to bid for the Summer Olympics. Only two cities (Tehran and Los Angeles) made serious bids for the 1984 Summer Games, but before the final selection of a "winning" city in 1978, the bid from Tehran was withdrawn as a result of Iran's policy changes following the Iranian Revolution and a change in the country's ruling system. Hence, the selection process for the 1984 Summer Olympics consisted of a single finalized bid from Los Angeles, which the International Olympic Committee (IOC) accepted. The selection was officially made at the 80th IOC Session in Athens on May 18, 1978.