Did you go to university? ivermectina para que sirve en la piel The disaster, North America's deadliest rail crash in twodecades, destroyed the center of the Quebec town of Lac-Meganticlast month after a runaway oil tanker train derailed on a curveand exploded. Crews are still cleaning up the 1.48 million U.S.gallons (5.6 million liters) of oil that spilled.