ktvu's christian katharine is there but first we'll go to ktvu's craig devereaux. >> the investigation is moving outward from ground zero on glen wood drive. a pg&e news conference as you mentioned just about to get underway at a fire station in san bruno on el camino real. this morning very important work is being done this morning on glenview drive. pg&e cut into three pieces of that ruptured gas line and put it on a truck. next stop is the ntsb headquarters in washington, d.c. this afternoon we've got something investigators might need too. it's a videotape of last thursday's deadly explosion. >> when i got here probably was half hour after the incident by the time i -- i still can feel the heat and the roar of the fire. >> reporter: the tape also shows the reaction of the people at the san bruno avenue and glenview road gas station. one man runs from his car at the pump. some people describe down the street towards the fire while a woman was a baby runs toward the camera. three pieces of the 28" gas line are heading to the ntsb in washington, d.c. investigators will try to determin