I have 9/11 never before seen footage! from inside the building.....?

and I am finally ready to reveal it, after so many depressing years of my life. I want to send it to the government or show them. Before I put it anywhere else, how do I get their number? It's footage from inside of the building, with night vision. Very important. Don't ask me how I got it or where I found it. Please can you give me the number?