mosul, iraq's second largest city, and tikrit, saddam hussein's former hometown. they're picking up defectors from iraqi security forces along the way as well as weapons and military vehicles. they freed several thousands prisoners now fighting for their cause. the entire contents of mosul's central bank estimated at $425 million, making them the world's richest terrorist group. that is a pretty scary thought. the iraqi military is focused on holding baghdad and cities key to their oil infrastructure. baghdad wants the u.s. to launch air strikes against these militants. but the white house is hesitant. this is opening a fresh foreign policy crisis for president obama. and for now, the pentagon says it's the job of iraqi security forces to hold their own. but that could all change if baghdad falls. half a million iraqis are already displaced. and remember, the u.s. lost 4,500 troops during operation iraqi freedom. 32,000 others came home wounded. we begin with jim at dod