at least one suspect planting a bomb. at this point, though, they have chosen not to release that specific video. i want to show you the video that they have released. i'll show you first suspect one. that's the man wearing the dark hat walking in front of suspect two in the white hat. they are washing in the direction of the marathon finish line about 12 minutes before the blast went off. this is according to the time stamp on the video we've received. the men stayed at the scene to watch the carnage unfold. then, they casually walked away. and here are the photos released today. suspect one, as you can see, these are the freeze frames in the dark hat carrying the dark-colored backpack. suspect two in the backwards white cap, much better picture of his face because of that. with a profile and a frontal. authorities say he left a bag that they believe could have contained one of the blasts on