Science Advisor to the President War II by President Franklin Delano Roosevelt. Vannevar Bush chaired this office through Roosevelt's death in 1945, and continued under Roosevelt's successor Harry S. Truman until 1951. 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
President of the Navajo Nation President of the Navajo Nation The office of President of the Navajo Nation was created in 1991 following restructuring of the national government. The president and vice president are elected every four years, and can only serve two terms in office. As outlined in the Navajo Nation Code §1001-1006, office holders have to be fluent in the Navajo language among other declared qualifications. The Navajo Nation Code defines who may become or act as President upon the absence of a sitting president or a president-elect. Should the President, under circumstances outlined in the Navajo Nation Code at §1005(d)-1006, be unable