informants. rapid response capture-kill missions. we'll take you on a heart thumbing raid into taliban strongholds. you will meet unsung her roys -- heroes who fight in the shadows to take down the taliban. many of the young americans serving today in afghanistan were just kids when terrorists attacked on 9/11. >> i was a freshman in high school. >> i was in my english 8th grade class. >> babysitting. >> i remember being in 11th grade english class. >> armed with a dire to serve their country, they joined the military and are now deployed in the shadow as part of nato's security assistance force. >> deployed around 80 to 85,000 additional forces. vast majority, u.s. forces. >> general petraeus the four star to led the surge in iraq