Photos From The Dreamliner Investigation Reveal Major Damage To The Jet's Battery

This morning, National Transportation Safety Board Chairman Deborah A.P. Hersman provided an update on the investigation into the cause of the fire in a parked Boeing Dreamliner jet in Boston on January 7.

Photos from her presentation, along with others released by the NTSB over the past month, show just how badly the "thermal event" damaged the 787's lithium-ion battery, which was the likely cause of the problem.

Here's how NTSB investigators figured out exactly where the fire started, the first step on the way to fixing the problem and getting the grounded Dreamliner back in the air.