Veteran Astronaut Heidemarie M. Stefanyshyn-Piper Leaves NASA

NASA astronaut and U.S. Navy Capt. Heidemarie M. Stefanyshyn-Piper has left NASA to return to the Navy. Stefanyshyn-Piper is a veteran of two space shuttle flights and five spacewalks."Heide has been an outstanding astronaut, contributing significantly to the space shuttle and space station programs," said Steve Lindsey, chief of the Astronaut Office at NASA's Johnson Space Center in Houston. "In