It didn't get much attention, but in mid-December, U.S. forces in Iraq discovered an al Qaeda torture center north of Baghdad. Muqdadiya is about 60 miles north of the capital. American soldiers found a blood-spattered room where chains still hung on the gory walls. A metal bed frame connected to an electric shock generator. The Americans also found bloody knives and swords. Outside, the bodies of 26 people were buried in common graves. That al Qaeda has made rape, torture and murder its calling card in Iraq is not news....Last May...U.S. troops unearthed an even grislier site, an al Qaeda...