Jerry M LinengerCapt. Jerry M. Linenger, M.D., Ph.D., is a retired U.S. Navy flight surgeon and NASA astronaut. A naval academy graduate, Dr. Linenger holds a doctorate in epidemiology, a master's in systems management, and a master's in public health policy. He hasalso been awarded three honorary doctorate degrees in science. During his mission aboard Mir, he logged fifty million miles in more than two thousand Earth orbits. He was the first American to undock from the space station in Soyuz spacecraft and the first American to spacewalk wearing a Russian spacesuit outside a foreign craft. At the completion of his mission, he had spent more continuous time in space than any male American. Read More Read Less