In 1961, a young African-American man, after hearing President John F. Kennedy's challenge to, "Ask not what your country can do for you, but what you can do for your country," gave up his student deferment, left college in Virginia and voluntarily joined the Marines.
In 1963, this man, having completed his two years of service in the Marines, volunteered again to become a Navy corpsman. (They provide medical assistance to the Marines as well as to Navy personnel.)
The man did so well in corpsman school that he was the valedictorian and became a cardiopulmonary technician. Not surprisingly, he was assigned to the Navy's premier medical facility, Bethesda Naval Hospital, as a member of the commander in chief's medical team, and helped care for President Lyndon B. Johnson after his 1966 surgery. For his service on the team, which he left in 1967, the White House awarded him three letters of commendation.