they clean away plaque in ways a manual brush can t. for that dentist-smooth, clean feeling every day. fight plaque with real power. oral-b power. greta: we have much more ahead. but first s lee earhardt. reporter: late word from the obama administration is the withdrawal of the last u.s. combat forces from iraq is complete. here are the latest pictures. army convoy rolling across the border into kuwait early thursday morning. more than 4400 members of the army s 4th striker brigade were the last to leave. this close to two weeks before president obama s august 31st, deadline for ending u.s. combat operations. 50,000 american troops will remain in iraq until the end of next year. senior administration official saying tonight their mission be to advise and