The Lopez family’s Olympic taekwondo dynasty lives on, though in slightly diminished form this time around. On a bittersweet night of Olympic trials, siblings Steven and Diana Lopez won their fights to earn a return trip to the games, but their brother, Mark, lost a tight contest in Saturday’s last bout. All won medals in the 2008 Olympics. Diana, meanwhile, is going to her second Olympics. She won bronze in the 57-kilogram weight division in 2008. On Saturday, she defeated Danielle Holmquist 3-1.