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 Portugal of the 1974 Carnation Revolution, the President is elected to a five-year term; there is no limit to the number of terms a president may serve, but a president who serves two consecutive terms may not serve again in the next five years after the second term finishes or in the following five years after his resignation. The official residence of the Portuguese President is the Belém Palace. The President is elected in a two-round system: if no candidate reaches 50% of the votes during the first round, the two candidates with the most votes face each other in a