Bill wrote:
http://abcnews.go.com/US/print?id=644388

NASA Acknowledges That Even Little Pieces of Foam Could Doom Space
Shuttle on Next Flight

By MARCIA DUNN
The Associated Press

Apr. 5, 2005 - After a two-year struggle to keep big chunks of foam
from coming off the shuttle fuel tank during launch, NASA
acknowledged
Tuesday even marshmallow-size pieces could doom the spacecraft under
the worst circumstances.

Shuttle systems engineering manager John Muratore said it is a risk
NASA and the nation must accept for flights to resume anytime soon.
...

How about that! Some unambiguous honesty from a shuttle program
manager. There is risk, and it is real.

- Ed Kyle