Check out the popular "Loose Change" film

Here is a very popular 9/11 film by Dylan Avery. Though some parts are weak and have been rightly criticised it is an overall good introduction into 9/11 truth. I personally recommend watching "9/11 Revisted" as an introduction into 9/11 truth (see Video links). There are many other fine 9/11 films out there as

"Improbable Collapse"

that ought to receive attention, and hopefully will in the near future. Look for more films posted here soon.