The new Shah was deposed in 1953 by Prime Minister Mohammed Mossadegh, but was soon brought back to power with the help of the United States and Great Britain. To maintain power in coming decades, the Shah abolished the multi-party system and set up his own secret police, the SAVAK, who became infamous for their human rights abuses. The Shah continued the modernization of Iran started by his father and sought to make his country a major regional power. This included a lavish coronation ceremony in 1967, a buildup of the military, and a transformation of the economics of oil production. While the Shah sought to quell political dissent, he did not succeed. Civil unrest grew in the mid-1970s, until the Islamic Revolution forced him into exile on January 16, 1979. He died on July 27, 1980, in Egypt, where Anwar Sadat welcomed him in exile after President Jimmy Carter refused to grant asylum for the Shah and his family in the United States.