People who came to watch the launch walk away after an unmanned rocket owned by Orbital Sciences Corporation exploded (background) October 28, 2014 just seconds after lift-off from Wallops Island, Virginia, on what was to be a resupply mission to the International Space Station.  "The Antares rocket suffered an accident shortly after lift-off," NASA mission control in Houston said, describing the blast as a "catastrophic anomaly."     MANDATORY CREDIT:  AFP PHOTO / Steve ALEXANDER        (Photo credit should read STEVE ALEXANDER/AFP via Getty Images)