MONTREAL — A year after three teenagers were killed by a Via Rail train under the Turcot Interchange, families and friends are heading to Ottawa to ask the federal government for a change to Canada's Railway Safety Act. Dylan Ford, Mitch Bracken, and Ricardo Conesa, were trespassing on the rail yards under the interchange when they were hit by Train 668 on Halloween night, 2010. Two friends survived because they were not on the tracks. The boys were known for spray-painting graffiti, although their families say when the crash happened the boys were walking back to their cars.