Where and how can i download a good flight simulator game for free?

I'd glady tell you, but how do I know you're not a terrorist ?Where and how can i download a good flight simulator game for free?
I'm not sure about a full scale simulator, but I know of a great model airplane and heli simulator called FMS. You can download more planes and landscapes than are already in it and it's a lot of fun.Where and how can i download a good flight simulator game for free?
Check out bigdownload.com and see if they have any good ones :-)

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