In this, the fifth of a series, Popular Science profiles one of the favored teams competing to win the Darpa Grand Challenge autonomous-vehicle race, which will take place on Saturday, October 8, near Primm, Nevada. Today we look at the Red Team's next-generation Hummer, which features a sophisticated system of integrated sensors. Stay tuned to popsci.comfor more previews throughout the week and for minute-by-minute videos and updates on race day.