P.M. Headlines

(New York Times): "Boston Marathon blast kills 2, police say"

(USA Today): "After Boston blast, Obama vows to get answers"

(Dallas Morning News): "Exclusive: As his presidential library debuts, George W. Bush prepares to return to the public stage on his own terms"

(The Hill): "Manchin-Toomey background check bill edges closer to 60 votes in the Senate"

(The Hill): "Gun lobbyist brags lawmakers 'have stepped into our trap' on background checks"