All but three of the terrorists were killed as well. Although arrested and imprisoned pending trial, they were released by the West German government on October 29, 1972, in exchange for the hijacked Lufthansa Flight 615. Two of those three were supposedly hunted down and assassinated later by the Mossad. Jamal Al-Gashey, who is believed to be the sole survivor, is still living today in hiding in an unspecified African country with his wife and two children. The Olympic events were suspended several hours after the initial attack, but once the incident was concluded, Avery Brundage, the International Olympic Committee president, declared that "the Games must go on". A memorial ceremony was then held in the Olympic stadium, and the competitions resumed after a stoppage of 34 hours. The attack prompted heightened security at subsequent Olympics beginning with the 1976 Winter Olympics. Security at Olympics was heightened further beginning with the 2002 Winter Olympics, as they were the first to take place after the 2001 September 11 attacks.