WWII: Combat Information Center, USS Killen, DD-593. Battle of Surigao Strait (25 October 1944). Johnson's job was to figure out the torpedo trajectory for the attack that eventually sank the Japanese battleship Yamashiro
JFK - US Secret Service; served with Franklin D. Roosevelt, Dwight D. Eisenhower, John F. Kennedy and Lyndon B. Johnson; also present and took part in the gunfight that foiled an assassination attempt on Harry S. Truman