On December 21, 1970, Elvis Presley showed up unannounced at the northwest gate of the White House with a handwritten six page letter to President Nixon. The letter iterated Elvis's desire to become a "Federal Agent-at-Large" in the war on drugs.
After a brief discussion with Elvis and his body guards, Nixon aide Egil Krogh became convinced the singer was sincere, and thought he might be helpful in reaching out to young people about the dangers of drug abuse. Elvis and Nixon met later than same day and were photographed in the Oval Office. Years later, that picture is one of the most popular holdings in the National Archives.