The NTSB says an investigation into a deadly plane crash in Addison, Texas is underway. NTSB investigator Jennifer Rodi says a crew is working to gather perishable evidence at this point. Ten people died after a plane crashed into a hangar at Addison Airport, about 14 miles north of Dallas, just after the twin-engine plane took off. NTSB Vice Chairman Bruce Landsberg said two aircrafts were inside the hangar and both of them sustained damage. A preliminary report is expected to be released in about two weeks. Specialists are currently reviewing footage of the incident in this fact-gathering stage of the investigation.