as you can see from one of the images, suspects one and two appear to be walking together through the marathon crowd on boylston street in the direction of the finish line. that image was captured as they walked on boylston in the vicinity of the intersection with gloucester street. as you can see, the quality of the photos is quite good. but we will continue to work on developing additional images to improve their identification value. >> let's go to tom foreman right now. he's taking a closer look at these images, the video and still photos that the fbi has released. >> wolf, i've been listening to your conversation over here. this is the actual sequence of this video, with these fellows turning the corner here, and then it picks up in the middle sequence of these shots. you see them start working further along the way here. as you see that, you realize they're in the middle of that walk. you see the woman with the bright green bag down there, that's the middle of it. as they come up this way, it