What questions remain one day after fatal New York City office building shooting

That's all right. So, when we look at this building, we know it houses the headquarters of several large financial firms like Blackstone, also the National Football League. This morning, officials familiar with the investigation tell NBC News the suspect left a note inside of a car near the scene.What are we learning about this person and a possible motive. >> Yeah. And apparently was that car that he got out of and then we saw obviously that surveillance video of him walking into the building.According to ...