Attitudes are chaining opn gun violence in the U.S., argues Vinny DeMarco, a former Maryland assistant attorney general who now heads Faiths United to Prevent Gun Violence. “Newtown changed the issue dramatically.”

He compared the Dec. 14 massacre at Sandy Hook Elementary School in Newtown, Conn., in which Adam Lanza killed 20 students and six school staffers before turning the gun on himself, to the police brutality in Birmingham, Ala., that gave new impetus to the civil rights movement in the early 1960s.

“The same momentum that gave us civil rights is going to give us gun violence prevention,” DeMarco said.