To the Families concerned our hearts are with you. This is indeed tragic news.
My heart felt condolences to all concerned.
I concurr with Spongebob, this has serious implications on progress of the Current Space Station Program.
I remmember Columbias first launch in 1981, I was a 13 yr old boy, we didnt even have a VCR back then, so recorded the audio on my cassette deck. Columbia certainly survived well through these years and supplied unparalleled service. RIP Columbia
Regards
Sheep