CUOMO: Welcome to our continuing coverage here at CNN, Chris Cuomo with Wolf Blitzer.</s>BLITZER: We want to welcome our viewers in the United States and around the world. Everyone seems to be glued right now to this standoff that's taking place here in Boston.</s>CUOMO: Well, this is the time to be watching because there is a manhunt going on right now on the streets of Boston. The city literally shut down. Here's what we know. One suspect is dead. One suspect on the run. Dramatic developments underway here in Boston. Let's bring you up to speed on the list of facts and the context that got us to where we are in the investigation. Authorities identified the Boston Marathon bombers as brothers from a predominantly Muslim region in Russia. They have gone to school her. They've said they're grateful to be here and love the country. But right now, a door-to-door search is underway in the Boston suburb of Watertown as police look for the younger brother, 19 years old, believed to be extremely dangerous, possibly armed with explosives -- Wolf?</s>BLITZER: And that is 26-year-old brother, the older brother, died after a shootout with police. We're told he was wearing explosives and a triggering device when he died. This dramatically intensified overnight.
Boston on Lockdown for Manhunt