This morning in Newtown, state police have briefed residents and reporters on the latest information about yesterday's tragic events. And at the moment, information about the shooter, who's been identified by law enforcement officials as 20-year-old Adam Lanza, is scant. He was found dead at the elementary school. Lanza is believed to have acted alone. NPR's Joel Rose is at this morning's briefing in Newtown. Joel, thanks for being with us.