You mean we weren't before?

Troops authorized to kill Iranian operatives in Iraq.

For more than a year, U.S. forces in Iraq have secretly detained dozens of suspected Iranian agents, holding them for three to four days at a time. The "catch and release" policy was designed to avoid escalating tensions with Iran and yet intimidate its emissaries. U.S. forces collected DNA samples from some of the Iranians without their knowledge, subjected others to retina scans, and fingerprinted and photographed all of them before letting them go.

Here I thought we were bringing the war on terror to the terrorists. Silly me.