Lag-Megantic is marking 5 years since the train derailment that killed 47 people The derailment destroyed part of the city's downtown A runaway train hauling crude oil derailed and exploded in the town of 6,000 in July 2013 The town is rebuilding, but a government study last year said many people still suffer from post-traumatic stress The federal and provincial governments will fund a bypass track to take rail traffic away from downtown Three former employees of the defunct railway company at the heart of the disaster, were found not guilty of criminal negligence