Congressman Burton suprised a few when he brought in photos of past attacks on Americans to demonstrate the relative cruelness of deadly, vulgar attacks to waterboarding.  The Washington Times posted an excerpt in late April that is listed below.

The shocked leaders of this nation have officially declared the
terrorist interrogation technique known as "waterboarding" to be cruel
and unusual punishment.

That being the case, one congressman, carrying in his arms
none-too-pleasant photographs, took to the floor of the House to remind
Americans what cruel and unusual punishment really looks like.
"This first one is the Pentagon of the United States. Several hundred
people were killed," began Rep. Dan Burton, Indiana Republican. "This
here is the World Trade Center. More people were killed in this attack
than any attack in the history of the United States by an enemy. Even
the attack on Pearl Harbor didn't even come close to this, although that
was a terrible thing as well.

"And this ... is what happened to a train where they set a bomb off in
Spain by al Qaeda. That was in Madrid. I have over here, that I am not
going to show tonight, where they have cut the heads off of Americans
and held them up. And where they've cut the heads off of Americans and
hung them from an overpass so that everybody driving by could see them."
There are more candid shots, but you get the picture.