Former US Navy pilot and Space Shuttle astronaut, Captain Alan Poindexter, 50, has been killed in a jet ski accident on 1 July.   Poindexter piloted the Space Shuttle Atlantis on STS-122 in February 2008 and was commander on the Space Shuttle Discovery mission STS-131 in April 2010.  Our condolences go to Alan Poindexter’s family and friends.