 NTSB investigators, said state police spokesman Beau Duffy, had been able to look at the vehicle's exterior but not yet examine its internal mechanics.The day after the article was published, Senator Charles Schumer told the media that an NTSB investigator had been "granted limited access" to the limousine.The state police issued a statement confirming that, and also noted that it was not the first time their federal counterparts had been able to view the Excursion.