Boston Athletic Association

The Boston Athletic Association, which runs the Boston Marathon, said it is "working on ways non-binary participants are accepted into the event."

Organizers and law enforcement officials are urging Boston Marathon spectators to leave backpacks and other bags at home. They also say crowds will be limited at the finish line where two bombs exploded a year ago. Monday's 26.2-mile race is expected to attract 36,000 runners _ about 10,000 more than usual for the event _ and about 1 million spectators...