 After the war, President Harry S. Truman replaced the OSRD with the Science Advisory Committee in 1951.The office was moved to the White House on November 21, 1957, by President Dwight D. Eisenhower to provide advice and recommendation in response to the Space Race started by the USSR's launch of the first artificial Earth satellite, Sputnik 1.President Richard M. Nixon eliminated the PSAC in 1973, rather than appointing a replacement for his second Science Advisor, Edward E. David Jr., who resigned.