At least 68 people are dead and dozens injured after a high-speed train rear-ended a stationary one near Toledo (Urda area), about 140 km south of Madrid. It happened Wednesday morning on the Madrid-Seville line. Spain has declared three days of national mourning. Officials are investigating a computer system failure plus human error. Rescue teams worked overnight.This is one of Europe’s worst rail disasters in years. Thoughts on transport safety?<div><br></div><div><br></div><div><br></div>