Bungie have released a behind the scenes documentary of Halo 3

In this fascinating short, you'll see some of the teamwork, thought processes and imagination that went into this Halo 3 teaser. You'll see the actual orchestra and choir session, some of the in-studio production work and interviews with some of the key folks who worked on the E3 presentation. You won't see everyone - lots of folks who slaved over hot keyboards to make this trailer a reality were simply too busy to be interviewed - and to them, our heartfelt appreciation

Watch the documentary online now