Sorry to burst your bubble Dale, but America's Army doesn't use the Unreal Engine 3. It uses Unreal Engine 2.5. America's Army won't be using Unreal Engine 3 untill late 2006-2007. And besides, no game will use Unreal Engine 3 until UT2007 gets released.
And BTW dale, the AA devs haven't even been physicly working with UE3, they just signed the papers to use it. and UT 2007 is well into development with UE3, so...AA isn't the first game to use UE3 like you mentioned. get your facts straight Dale.