President Barack Obama emotionally addressed the nation Friday, hours after 20 children and 6 adults were gunned down in a Connecticut elementary school in one of the worst school shootings in American history. "Our hearts are broken today for the parents and grandparents, sisters and brothers, of these little children and for the families of the adults who were lost. Our hearts are broken for the hearts of the survivors as well," he said. "They know that their children's innocence has been torn away from them too early." The president wiped away tears as he pledged to help law enforcement investigate the murders, which police were still trying to piece together Friday afternoon. "We have been through this too many times. These neighborhoods are our neighborhoods, and these children are our children," Obama said. "May God bless the memory of the victims." Other lawmakers expressed their condolences, too, with Connecticut's outgoing Sen. Joe Lieberman saying he was "shocked and heartbroken," Sen. Richard Blumenthal calling the shooting "inhuman" and the district's Rep. Chris Murphy, also the state's Senator-elect, calling the news "horrific."