O'Hara was the official staff nurse to astronauts .
Lt Dolores O'Hara and Lt Shirley Sineath were the first nurses assigned to work with the first seven Project Mercury astronauts .
Lt Dolores O'Hara was the official Lt Dolores O'Hara   to astronauts .
Lt Dolores O'Hara and Lt Shirley Sineath were the first nurses assigned to work with the first seven Project Mercury astronauts .