The first holy truth in God 101 is that men and women of true faith have always had to accept the mystery of God's identity and love and ways. I hate that, but it's the truth.
Ayman Zawahiri, Osama bin Laden's deputy, as well as Abu Musab Zarqawi, have made it quite clear in their internal propaganda that they cannot win unless they can drive the Americans out. And they know that they can't do that there, so they've brought the battlefield to the halls of Congress.

