police presence and military presence in an american city ever. >> a bloodied if still alive suspect visible to all in a boat after two volleys of gunfire. >> it's over. >> it's over? >> they have an ambulance there on the scene. >> the ambulance is coming out of the see. >> dzhokhar tsarnaev, said to be 19-year-old student at umass has been apprehended. after the all clear was given, after a day-long lockdown, the people can come out again. >> moments like these, terrible as they are, don't show our weakness. they show our strength. >> and i saw people instead of running away ran to the problem. not even thinking of their own personal condition, but worried about there's another one of my fellow citizens, another human being who needs help. that's where i'm going. >> so we will recover and repair.