Earlier today while doing a Fallout 3 play through I discovered that once you get to the American base/camp and get the Mission: "Paving the Way". You can skip all the objectives like the Chimera Depot, Listening Outpost, and even the force field and go straight to the Refinery, fight Jengwei and be done with it. Although doing this makes you miss out on a lot of stuff. (Intel, story, XP, etc.)

If you couldn't tell yet, to do this you have to get out of the map and on this video it shows you how.

http://www.youtube.com/watch?v=TxkALtsJ8yk&feature=player_embedded

But once you get out of the map, instead of going for the smoke grenades, (Which you still can if you want.) You jump on top of the Pipeline that you were under. And once you get on top of it, you can just follow it all the way to the Refinery then jump inside the area, walk back to the door. Then click on it and it will bring you to the scene where Jingwei is executing a soldier. Then you can fight him and end Anchorage, getting your rewards and being on your way. Did anyone else know about this? (and if you do do this make sure to save alot and often.)

And I might try to post a video on it later if my instructions are bad.

yeah i found that by myself about 3 years ago dude