(PHOENIX) — In cross-country running, your team is only as fast as your slowest athlete. Slain Navy SEAL Charlie Keating IV took that to heart in his youth as a track star, turning around to cheer on his teammates after he crossed the finish line. Those that knew Keating say it was that same force of character that motivated him in northern Iraq, where the 31-year-old was killed Tuesday in a gunfight with Islamic State militants.