Too bad that nasa didnt add a real escape system to the remaining orbiters, it would of saved the columbia crew, and the program wouldnt be shutting down now,
doubt it would have saved the Columbia crew - 200,000 is pretty darn high up to bail out and have any expectation to survive a disaster. Heck, even Fearless Felix was lucky and his was only like 130,000 feet with lots of practice and no disaster to get out of without hoping you don't rip your suit on the disintegrating shuttle like the Columbia crew would have faced if they were aware enough to even bail out given the chance.
the program shut down because of the tile design flaw and age of the hardware/hard to find parts, so I think a bail-out system would also not have made any difference.
as for Challenger, never got to see it as I was in class (but did watch it after school as the special report continued on tv). didn't have a c-band dish to record anything, but I'm fine with that as I have a DVD of the accident and the investigation from an outfit that took that NASA Select video from the NASA archives and cleaned it up and put it on DVD. Much better quality than I'm sure I would have if I had VCR'ed it and then transferred it like the OP.
I should transfer my Columbia stuff from my VCR tapes to MPEG computer files because I don't know when a Columbia accident DVD with footage from the NASA archives and cleaned up will be released.