By Gary Smith, World-Track EUGENE — Lashinda Demus came back strong in the closing metres to win the women’s 400m hurdles finals with a world-leading 53.78 and collect her third outdoor title at these U.S. Championships. Fighting with the wind in the opening section of the race, the 2005 world silver medallist pulled away from Sheena Tosta, who finished second in 54.45 and defending champion...