Soft drink maker Pepsi said on Thursday that it was dropping sponsorship of a prestigious national horse show, one day after ABC News broadcast footage of a horse in training for a show being beaten by a trainer. The Walking Horse National Celebration said that Pepsi had been a sponsor since 2010 of the nation's leading competition for Tennessee Walking Horses, a breed known for its high-stepping gait. "We have ended our sponsorship of the event," Pepsi spokesman Vincent Bozek said on Thursday without elaborating. ...