Delaware Park cancelled racing Wednesday and Thursday because of the poor air quality in the Mid-Atlantic region, the organization said in a press release Wednesday morning. "Acting upon the recommendation of the Delaware Thoroughbred Racing Commission (DTRC) veterinarians in conjunction with the Horse Racing Integrity and Safety Authority's (HISA) air quality guidelines, Delaware Park has cancelled the live racing cards scheduled for today and tomorrow due to the very unhealthy air quality levels in the area. Live racing is scheduled to resume this Friday, June 9." Shortly after the Delaware...