While current law, (United States Code Title 10), beginning in 1918, explicitly state that recipients must be serving in the U.S. Armed Forces at the time of performing a valorous act that warrants the award, exceptions have been made. For example, Charles Lindbergh, while a reserve member of the U.S. Army Air Corps, received his Medal of Honor as a civilian pilot. In addition, the Medal of Honor was presented to the British Unknown Warrior by General Pershing on October 17, 1921; later the U.S. Unknown Soldier was reciprocally awarded the Victoria Cross, Britain's highest award for gallantry, on November 11, 1921. Although being a U.S. citizen is not a prerequisite for eligibility to receive the medal, apart from a few exceptions, Medals of Honor can only be awarded to members of the U.S. armed forces. Sixty-one Canadians who were serving in the United States armed forces have received the Medal of Honor; most received it for actions in the American Civil War. Since 1900, only four have been awarded to Canadians. In the Vietnam War, Peter C. Lemon was the only Canadian recipient of the Medal of Honor.