We talk to trainer Brad Cox after Dragoon Guard and Impel worked together at Churchill Downs for the first time in preparation for, respectively, next Saturday's $300,000, Grade 3 Indiana Derby and $200,000, Grade 3 Indiana Oaks at Horseshoe Indianapolis. Dragoon Guard and Impel worked five-eighths of a mile in 1:00.60, with jockey Florent Geroux aboard Impel and Axel Concepcion on Dragoon Guard. Geroux will ride both horses at Horseshoe Indy.