Daniel

At 24 years of age, U.S. Army Ranger Sean Parnell was named commander of a forty-man elite infantry platoon - a unit that came to be known as the Outlaws - and was tasked with rooting out Pakistan-based insurgents from a mountain valley along Afghanistan's eastern frontier. Parnell and his men assumed they would be facing a ragtag bunch of civilians, but in May 2006 what started out as a routine patrol through the lower mountains of the Hindu Kush became a brutal ambush.

Here is the astonishing, never-before-told story of the greatest rescue mission of World War II: when the OSS set out to recover more than 500 airmen trapped behind enemy lines. During a bombing campaign, hundreds of American airmen were shot down in Nazi-occupied Yugoslavia. Local Serbian villagers risked their own lives to give refuge to the soldiers, and for months the airmen lived in hiding, waiting for rescue.

Ninety-nine elite American soldiers are trapped in the middle of a hostile city. As night falls, they are surrounded by thousands of enemy gunmen. Black Hawk Down drops you into a crowded marketplace in the heart of Mogadishu, Somalia with the U.S. Special Forces - and puts you in the middle of the most intense firefight American soldiers have fought since the Vietnam War.

A parallel army lives on the margins of the Iraq war - nearly 100,000 armed men, invisible yet in plain sight, doing jobs the overstretched and understaffed military can't or won't do. The U.S. media call them "security contractors." They call themselves "mercs," and they operate under their own rules. Washington Post reporter Steve Fainaru traveled with several groups of security contractors to find out what motivates them to put their lives in danger every day.