Unleashing a LETHAL KICK! Trailing sub-4 miler Carter Smith going into the final lap, Philip Cupial throws down a 5️⃣5️⃣.2️⃣1️⃣-second last 400m to snatch the #NBNationals boys mile title in 4:01.15. Smith finished second in 4:01.72. 📸: johnnepolitan