VIDEO: Martha’s Vineyard Airport was closed for about 3½ hours Tuesday morning due to a bomb threat, but reopened after a bomb-sniffing dog did not find anything suspicious, assistant airport manager Geoffrey Freeman told The Times. At 7:26 am, West Tisbury Police Chief Matt Mincone called the situation an “active investigation.” However, peril bottomed out as the morning wore on. “We’re clearing the scene,” West Tisbury Fire Chief Manuel Estrella III told The Times as he exited the airport at approximately 9:30 am. First responder crews composed of Edgartown firefighters and EMS staff, a West Tisbury rescue company, and Tri-Town Ambulance staff staged in the vicinity of Vineyard Decorators while West Tisbury Police, the Dukes County Sheriff’s Office, and Island State Police worked with airport staff to explore the threat. Airport staff coordinated with TSA, FAA, and MassDOT’s aeronautics division. The airport’s Air Rescue Firefighters (ARFF) staged on the tarmac.