Space shuttle Columbia astronauts, from left to right, Israeli Ilan Ramon, Laurel Clark, Michael Anderson, Kalpana Chawla, David Brown, William McCool and Rick Husband at a January 3 news conferance at Johnson Space Center in Houston.
By Mark Heller, Tribune
By Mark Scarp, contributing columnist
By Jerry Brown, contributing columnist
Guest Commentary by Bill Richardson
Guest Commentary by Shawn Thiele