August 21, 2013 Staff Report, NASCAR Wire Service  Bristol, Tenn. -- About to be lapped 20 laps from the finish, Kyle Busch took advantage of a late caution to regroup and charge back to his fourth NASCAR Camping World Truck Series victory at Bristol Motor Speedway on Wednesday night. Busch’s deciding pass of Ryan Blaney came on the 195th of 200 laps around the .533-mile track but he was challenged at the checkered flag by defending UNOH 200 winner Timothy Peters. The pair of Toyota Tundras crossed the start-finish stripe literally side-by-side with Peters - who’d held a two-second advantage when the night’s…