Next airing Tue Dec 8, 5:30 a.m. ET

Trapped by the Enemy

While on their way to rescue a foot patrol, a convoy of Marines gets stuck in a trench and is ambushed by Taliban forces in Afghanistan. They need to tow their lead vehicle out before the enemy gets the upper hand. And in one of the most dangerous areas of Iraq, a routine Army patrol drives into an improvised bomb with devastating consequences.