During the Commemorative Air Force Air Show, there has been an incident at Dallas Executive Airport. It is involving a  mid-air collision involving two planes at Dallas Executive Airport, Dallas A Boeing B-17 Flying Fortress was involved in a midair collision with another aircraft at an Airshow in Dallas. Around 1:25 p.m., the accident occurred during the Wings Over Dallas WWII Airshow. There has been no word on the status of the pilots or whether any injuries have been reported as a result of falling debris.     Bystanders said the wing just came off as it flew over the airfield. According to the Dallas Police Department, Dallas Fire and Rescue is responding.