Nearly one year ago, a freight train loaded with oil derailed and exploded in the core of Lac-Mégantic, Que. The area closest to the blast site, known as the "red-zone," has remained off-limits for months because of the hazards and a criminal investigation. 

Lac-Mégantic's original core is gone, and a new downtown is rising adjacent to the disaster area where a stretch of businesses once stood. 

This Radio-Canada exclusive video, taken with a drone camera, shows the site of the disaster and the rebuilding efforts one year later.