School Bus Fires News Today

Start researching how to build this pipe bomb a year ago? >> reporter: thats right, david. and, they say, he started gathering the components for that bomb three weeks ago. now, he could face life in prison. david? >> gio benitez on the case again tonight. and next here this evening, to the tragedy on the way to school in iowa. a school bus catching fire, taking the lives of the driver and a student. and how did this happen? tonight, the ntsb is now investigating. and heres abcs david kerley. ...