Additionally, his administration pushed for the Controlled Substances Act and began the War on Drugs. He also presided over the Apollo 11 Moon landing, which signaled the end of the Space Race. He was re-elected with a historic electoral landslide in 1972 when he defeated George McGovern.
In his second term, Nixon ordered an airlift to resupply Israeli losses in the Yom Kippur War, a conflict which led to the oil crisis at home. By late 1973, the Nixon administration's involvement in Watergate eroded his support in Congress and the country. On August 9, 1974, facing almost certain impeachment and removal from office, Nixon resigned from the presidency. Afterwards, he was issued a pardon by his successor, Gerald Ford. During nearly 20 years of retirement, Nixon wrote his memoirs and nine other books. He undertook many foreign trips, rehabilitating his image into that of an elder statesman and leading expert on foreign affairs. He suffered a debilitating stroke on April 18, 1994, and died four days later at the age of 81. Surveys of historians and political scientists have ranked Nixon as a below-average president.