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
Secretary-General to the President Provisional Governments of Michael Collins and W. T. Cosgrave (January–December 1922) McDunphy, like the Presidential Commission, was originally based in Dublin Castle until a new presidential residence was chosen. He moved into the new Áras an Uachtaráin (formerly the Viceregal Lodge) in June 1938. McDunphy proved to be a difficult and complex Secretary to the President. A passionate believer in structure, he spent his period in office creating numerous rules and regulations. While the first president, the politically inexperienced Douglas Hyde accepted his rules automatically, his successor, the more politically experienced former Tánaiste, Seán T. O'Kelly, who became president in