Still don't think it was military planes that hit the towers? 12 more witnesses http://www.youtube.com/watch?v=xsmc_rS2jOo
There are around 16 LIVE reactions of groups of people close enough to see the plane, guess how many of those people said the plane was either: no commercial plane OR a military plane (grey, no markings). ALL of them.
There is not a single witness who saw the plane who thought or made any suggestion that the plane was a commercial plane let alone a UA plane.
And if there ever is one you can bet your life that it is a paid actor and/or thought it was a commercial plane based on the shape or because they painted the tail blue.