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Delta Force
One of the two elite counterterrorist forces in the US arsenal, Delta Force is feared worldwide for its phenomenally lethal skills - the product of constant, intense training, including hours of shooting practice each day. Formed in 1977 by US Army Colonel Charles "Chargin' Charlie" Beckwith, the force is modeled after the British SAS. They are experts in all-weather combat and are noted for "double-tapping," firing two shots in rapid succession at their targets to take them down quickly and effectively. Delta is so secret that the Army still denies its existence. The only force in the military on a war footing year round, the operators of Delta, or "D boys," train in the arctic, the desert, and practice raiding mock-ups of office buildings and even borrowed aircraft. In order to graduate, each operator must go through a legendarily intense selection and training process which culminates with a live fire drill in a darkened room with their own teammates playing the role of hostages.

Headquartered in a former prison complex in Fort Bragg, North Carolina, Delta has fought in Grenada, Honduras, Panama, both Iraq wars, and many other places you will never hear about. After 9/11, Delta Force began training with Nuclear Emergency Support Teams (NEST teams) from the Department of Energy to do coordinated searches of population centers in case a terrorist nuclear bomb was discovered on US soil. And they are rumored to have conducted drills with Israeli counter terror units to prepare for an ugly, bloody Easter-egg-style hunt for nuclear weapons in Pakistan if the regime there collapses.

Enemy:
Abu Musab al-Zarqawi
Two years ago, correspondence penned by Abu Musab al-Zarqawi was intercepted by authorities. Long and chilling, the letter was a plea to al Qaeda for assistance in the uprising against Coalition forces in Iraq. Al-Zarqawi's plan of action included murderous attacks and the kidnapping of Americans, and in the months to come, al-Zarqawi's callous proficiency in fulfilling his pledge to violence landed him a top spot on Iraq's Most Wanted list. Al-Zarqawi was every bit as evil as Osama bin Laden, maybe even more so, and the US military wanted him dead.