 We're neighbors, we're friends, co-workers, citizens, and most importantly, we're fellow Americans. Mr. Biden acknowledging the deep differences in both parties and insisting the nation cannot solve its debates with violence. Andy Field, ABC News, Washington. Also on Sunday, Pennsylvania's governor paying tribute to the former volunteer fire department chief who was killed in Saturday's attack. They say he was shielding his family from the gunfire at the time. Here's ABC National correspondent Brian Clark.