Why was Lyndon B. Johnson sworn in?

lyndon B Johnson was sworn in on Air Force One in Dallas at Love Field Airport on November 22, 1963. He was sworn in by Federal Judge Sarah T. Hughes, a family friend, making him the first President sworn in by a woman. He is also the only President to have been sworn in on Texas soil. Johnson did not swear on a Bible, as there were none on Air Force One; a Roman Catholic missal was found in Kennedy's desk and was used for the swearing-in ceremony.