Greece train crash is deadliest in decades

Read MoreDozens of people are dead and dozens more are injured after a passenger train collided head-on with a freight train outside the Greek city of Larissa. Authorities say the cause is still unclear. Holly Williams reports.Dozens of people are dead and dozens more are injured after a passenger train collided head-on with a freight train outside the Greek city of Larissa. Authorities say the cause is still unclear. Holly Williams reports.