“THE DARK KNIGHT RISES” remained atop the box office this weekend — but the Aurora shooting tragedy on the night of the Batman film’s debut apparently continues to affect some of the public willingness to go see it. “The Dark Knight Rises” grossed nearly $64.1-million in its second weekend in North American theaters — a sizable 60-percent drop from its debut weekend, according to estimates reported Sunday by Warner Bros. Final numbers are expected Monday.