Residents of the Grand Canyon National Park paid their respects at a memorial service for the 25 victims of an in-flight collision Wednesday between a sightseeing plane and helicopter. About 300 people from the small Arizona community filled the multidenominational center in Grand Canyon Village. Many were forced to stand in the aisles because of the large crowd. The families of the pilots of both planes attended the service. The Rev. Richard Matteson of the Grand Canyon Community Church and the Rev. Ronnie Nation of the Grand Canyon Baptist Church spoke at the 45-minute service.