Our emergency action plan started as if it were here," said Gibson.Close to 17,000 runners and 40,000 spectators are expected for this year's miniMarathon.Thunder Over Louisville draws hundreds of thousands of people annually.KDF President and CEO Mike Berry said Thunder has always been very successful with dealing with massive crowds."Thunder was used as a case study by the federal government in how to communicate and respond to emergencies," said Berry.If anything catastrophic were to occur, Gibson said they will have emergency personnel standing by."We have two very massive mobile tent units that are triage hospitals on either side of the venue," said Gibson.Last year at Churchill Downs, a record 165,000 people attended the Kentucky Derby.The Oaks had 113,000 in attendance, the second-most ever.Churchill Downs' Vice President of Communications John Asher said it's too soon to tell if they will make changes to their security detail."We already have strong security measures in place.