Horizon tonight

Did anyone see Horizon tonight about the space shuttle disaster? Well i
haven't been on this group for a while. ((but i was right up until the
disaster circa February)
That guy on there (forget his name) suggested they could of easily inspected
the shuttle tiles with a space walk etc. And or travelled across to the
spare shuttle 'waiting' alongside to rescue them.

Hmmm i thought the space lab prevented them from leaving the shuttle as
there was no air lock chamber because of this? And if they could get
outside, without a jet propulsion pack or robot arm, they would drift
hopelessly around? Am i right, who was that guy?

The only revelation for me was the testing of the foam impacting the wing, i
for one was surprised the damage something with such little mass could
cause, as im still not able to fathom how the foam was travelling so fast
into the wing, was it the fact the shuttle was going so fast into the foam/
or the relative deceleration of the foam after breaking from the fuselage to
the velocity of the shuttle?

Sorry i know this has been debated many times, but it's faded from my mind
somewhat.

Thanks for listening.