QUEBEC (AP) - Paul McCartney has paid tribute to victims of a train disaster in Canada. He offered free concert tickets to survivors of the train wreck - and dedicated the song "Let It Be" to them. The rendition earned him the longest ovation of the night during the performance in Quebec City. About 1,000 people from the community of Lac-Megantic were given free tickets to the show, two weeks after a train disaster killed dozens of its residents. Speaking in French, McCartney told his audience: "I dedicate this song to you."