CIMARRON, Kan. — An Amtrak train carrying more than 140 people derailed in rural Kansas early Monday, moments after an engineer noticed a significant bend in a rail and applied the emergency brakes, an official said. At least 32 people were hurt, two of them critically, authorities said. Hours later, investigators said they were checking whether a vehicle crash may have damaged the track before the accident. The train known as the Southwest Chief was apparently traveling at about 75 mph when the engineer noticed the deformity in the rail and pulled the brakes, a U.S.