BROOKLYN, Mich. — After four drivers posted laps of over 200 mph during a morning test session, Greg Biffle was asked if the fast new track at Michigan International Speedway might be good for the sport.
    "Certainly this doesn't hurt us," Biffle said. "We don't want to kill anybody, either, so we've got to walk that fine line of killing people and creating excitement."
    After being repaved in the offseason, the two-mile track at MIS was the talk of the Sprint Cup drivers Thursday. A NASCAR official said after the morning session he expected speeds to decrease before too long, but that didn't happen in the afternoon. After four drivers exceeded 200 mph in the morning, seven did it during the second test session, including Tony Stewart, who set the day's standard at 201.896 mph.