dating back to 2006. this video has surfaced of a fire at a boeing contractor's lab near tucson, arizona. it was sparked when a lithium ion battery -- the same kind used in the dreamliner -- exploded during the test. a company makes the battery charger for the dreamliner, and we know ntsb investigators were back at this location this week testing the charger. the battery concerns prompted the faa to issue special rules for the installation of the batteries in the 787 of. investigators said yesterday the safety systems put in place by boeing definitely did not work. jon? jon: so the experts are pessimistic about getting this plane back in the air anytime soon? is. >> reporter: yeah. today didn't say how long the investigation would take, but we're talking about months, not weeks before the dreamliner will fly again, perhaps many months. investigators say nothing can be ruled out. they're looking at the overheated batteries perhaps being part of a bad batch, looking at the plane's