The first inauguration of Lyndon B. Johnson as the 36th president of the United States was held on Friday, November 22, 1963, aboard Air Force One (specifically VC-137C SAM 26000) at Dallas Love Field, following the assassination of President John F. Kennedy earlier that day. The inauguration – the eighth non-scheduled inauguration to ever take place – marked the commencement of the first term (a partial term of 425 days) of Lyndon B. Johnson as president.
There were initial reports that Johnson might have also been shot, slightly wounded in the arm or that he had suffered another heart attack (he had suffered one eight years earlier that nearly killed him). Mrs. Johnson confirmed to reporters that he was fine and did not suffer any injury or illness other than being shaken at what he had seen.
(Wikipedia}
