WATCHING the Space ­Shuttle Columbia hurtling skywards at 17,000mph, Dr Jonathan Clark felt a conflicting mix of emotions. As part of the Nasa ground control team, he was excited and proud to see ...

"These tragedies changed NASA," said Vanessa Wyche ... the alternate universe," he said.In the video below, Jon Clark talks about a card that a friend's young daughter made for Laurel Clark ...

“There was a lot of wailing,” Jon Clark said. “The most somber cry you could ever imagine. It was really horrible.” The astronauts’ families were loaded onto NASA planes and flown back ...