see it. this seems like a really big thing to just be made public. norah: 60 minutes report who is the man behind the camera and why it raises new questions about if al qaeda acted alone. the cbs evening news starts now. we start with a cbs news exclusive. the unnerving video outside the u.s. capital filmed two years before the 9/11 attacks. good evening. i m norah o donnell, and thank you for being with us. two decades ago, the 9/11 commission found that al qaeda acted alone, but victims families say that is not true, pointing to this video and other evidence as proof. they are suing saudi arabia claiming its government provided crucial assistance to the hijackers and planners behind a september 11th attacks. that killed nearly 3,000 people. here is 60 minutes correspondent cecilia vega. looking. reporter: a voice on the video says in arabic i am transmitting these scenes to you from the heart of the american capital, washington. this video unsealed in fed