Kurt Sonnenfeld filmed remains of the towers at ground zero just after the event on 9/11. His has hours and hours of very detailed footage of the remains. He has been a target of the US government. They a accuse him of having killed his ex-wife. He now lives is Argentina. The US government wants him extradited.
9/11 Kurt Sonnenfeld: The man behind the camera 9/11 witness
https://www.youtube.com/watch?v=8nX_DhQBUp8
Kurt Sonnenfeld 9/11 Ground Zero Footage (FULL)
https://www.youtube.com/watch?v=8KGaOj6S69E
Kurt Sonnenfeld 9/11 Ground Zero Footage (Part 1 of 2)
https://www.youtube.com/watch?v=qjEWLWxtNHg
Kurt Sonnenfeld 9/11 Ground Zero Footage (Part 2 of 2)
https://www.youtube.com/watch?v=FtLSJtyysJ8
The story of Kurt and the suicide or possible murder of his ex-wife
http://www.gq.com/story/kurt-sonnenfeld-9-11-conspiracy-theory