"Poland is observing a second day of national mourning after the country's worst rail disaster in over 20 years on Saturday. Two trains collided on the Warsaw-Cracow line, killing 16 people and injuring 58. A preliminary investigation suggests that the crash may have been caused by human error rather than faulty infrastructure. A distraught signalman has been admitted to a psychiatric hospital, where doctors are holding off the police." (Quoted from article)