India's eastern odicia state. cbs's monitoring it all from london. >> reporter: a sheet thrown to cover a face. a last dignity for a life lost. one of an astonishing hundreds in india's worst train tragedy since at least 1999. this drone view from above makes clear the degree of devastation. an express passenger train derailed. several of its carriages buckled. those then collided with another passenger train, then a parked freight train. in the moments after the accident friday evening lucky survivors climbed out. the less fortunate pulled out while the dead were laid out next to the tracks. ...