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 Philippines disability, removal from office, or resignation of the President, the Vice President will become the President to serve the unexpired term. In case of death, permanent disability, removal from office, or resignation of both the President and Vice President; the President of the Senate or, in case of his inability, the Speaker of the House of Representatives, shall then act as President until the President or Vice President shall have been elected and qualified. The Congress shall, by law, provide who shall serve as President in case of death, permanent disability, or resignation of the Acting President. He shall serve