The United States and Botswana went down to the wire in the men’s 4×400-meter relay on Saturday. Ultimately, it was the U.S., which managed to come away with the gold in a thrilling finish. Quincy Wilson got things started off, trailing the pack as he handed off to Vernon Norwood. He made a surge down his final 100 meters and got into third place as he passed the baton to Bryce Deadmon, who immediately jumped out to the front of the pack to take control of the race. The anchor of the race, Rai Benjamin, took it from there. He went against 200-meter champion Letsile Tebogo for the final leg, an…