Crews work around the clock to put out blaze after train carrying highly flammable ethanol derailed in Minnesota

Nearly a day after a train carrying a highly flammable chemical derailed and burst into flames in a small city in southwestern Minnesota, crews were still working overnight to extinguish the flames as officials reassure residents the groundwater and air are safe.Nearly a day after a train carrying a highly flammable chemical derailed and burst into flames in a small city in southwestern Minnesota, crews were still working overnight to extinguish the flames as officials reassure residents the groundwater and air are safe.