You are likely to see and hear helicopters, Coast Guard vessels, and police and emergency vehicles near Harbor Island on Wednesday May 25. Don't be alarmed. It's only a drill.

A multi-agency maritime training drill hosted by the King County Sheriff’s Office Special Operations Section on May 25th.  The exercise will be conducted in Puget Sound near Harbor Island and will include the Seattle Police Department, Washington State Patrol, F.B.I., U.S. Coast Guard, U.S. Customs and Border Protections and King County Medic One.