refusing to sign an agreement with the white house over long-term troops in afghanistan. >> that's right there are now 42,000 u.s. troops in afghanistan. they want to get this agreement for a number of troops, probably about 10 thousa,000 to remain a 2014. the job of the u.s. troops will be to train and assist afghan forces and do the very dangerous work of continuing to go after terrorist targets in afghanistan. he hasn't signed the agreement and the u.s. is getting increasingly frustrated with him, given especially the price that u.s. troops are paying. >> yeah, all right. barbara appreciate the update. thank you. more than 12 years long, this is america's longest war. another siring chapter. the story began when a four-man navy seal team found themselves badly out numbers in a long and vicious fire fight. one sale sueal survived. his name is marcus. this is his account of a mission that went wrong after he says his unit was surprised by of all