Two doctors will accompany Sen. John Glenn, NASA's newest and oldest astronaut, into space in October.

One is a heart surgeon. The other is trained in emergency medicine."No, no, no," NASA spokeswoman Jennifer McCarter said when asked Friday if the doctors were assigned for the benefit of Glenn, who will be 77 at the time of the space shuttle flight. "It's coincidence."

Another spokeswoman, Peggy Wilhide, noted that two physicians are also assigned to the next shuttle flight in April.