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 Ecuador the office to change presidents frequently throughout the history of the country. At least five times, the duties of the president have been charged to a provisional government or a military junta. Often, the office has been left to an interim or acting president, many of whom would go on to become president. The President who has served the most terms in office is José María Velasco Ibarra, who served five. Before president Rafael Correa, the last president to serve out his complete term in office was Sixto Durán Ballén, who served from 1992 to 1996. President of Ecuador The