Raw Story's Larisa Alexandrovna has identified a disturbing problem with Khalid Shiekh Mohammed's confession. Apparently, one of the buildings he supposedly was plotting to blow up wasn't built until AFTER he was captured:
In his confession, KSM claims:
"I was responsible for planning, training, surveying, and financing for the New (or Second) Wave of attacks against the following skyscrapers after 9/11: ...Plaza Bank, Washington state"
The Plaza Bank was not founded until 2006 according to their official Web site
This certainly suggests that KSM's confession isn't worth much. Perhaps he simply started confessing to anything and everything once he was put under the waterboard. I suppose, as a strech, you could say he knew back in 2004 that people in Washington were planning to build the Plaza Bank, and therefore he set about financing a plot to blow up this not yet built bank, but that seems like a ridiculous stretch.
More reasonably, it shows that kidnapping a person and torturing them is not a good way to get reliable information. Rather, it's a good way to get patently and provably false information, as was apparently done here.