They are a downer.

that we owe it to the 2,900 victims to watch.

it was sad. However the History Channel's "102 minutes that changed our world" was an amazing tribute

They took time stamped video from the hundreds of people who video taped the day and put them all in cronological order. Amazing.

I liked the 'I-Witness' piece at the end where they interviewed the people holding the cameras.

That was excellent

That's what I was actually watching - the History Channel did an amazing job!