Bungie -- ever secretive -- is guarding the full details of Halo 3's storyline, but the creators were kind enough to let 1UP play a few missions and get a feel for the single-player experience: the graphics, the controls, the challenges.
Tsavo Highway is the game's third mission, set near the Kenyan coast not far from Halo 2's New Mombasa. (Kenya seems to factor heavily into the Covenant's schemes, likely due to the presence of an ancient alien installation called the Ark, which in true Bible style is believed to be a refuge from or a weapon against the parasitic Flood.) The level begins in the shattered ruins of a human military base.
