many saw a resemiblens between the missing man and many suspects. all of this bringing more heartbreak to a family desperate for answers. i'll talk to the family exclusively. that's tomorrow night. now, anderson cooper. >> piers, thanks, good evening, everyone. 10:00 here in boston. we have breaking news on many, many fronts tonight, including where authorities say the suspects bought pressure cookers used in the two ieds that did too much damage used not too far from where i'm standing. an official told them they bought them at a department store macys. there's no hard eft of accomplices that they know of from overseas and no conclusions about what they've radicalized them. there's that, but that's only the beginning. in a moment, you're going to meet the man who came face-to-face with the bombing suspect in his boat. here's an acount different from what we've all been hearing. just imagine what you'd do in his shoes.