What? You understand that there's video of the o-rings failing, allowing the ignited propellant to escape through the failed seal and it's flame pointed exactly at the hydrogen storage tank?
How much more proof do you want? Also, I wouldn't call the o-ring theory anything less than a stinging indictment of NASA, it's management and quality control measures as well as several sub-contractors, including Morton-Thiakol.
*ahem* The NASA and Morton-Thiokol engineers refused to sign off on the launch.
They were overridden by NASA and M-T management.
I can't help but think the final decision was driven by the desire to have the Shuttle in orbit for that evening's State of the Union address.