A truck bound for the USDA Plum Island research center has fallen off of a ferry into Plum Gut. Two persons were on board, and both are missing. Plum Island is off the tip of Orient Point Long Island. This occured at 10:04 EST. This was received via a Coast Guard Channel 16 broadcast, from USGC Long Island Sound Group. www.ars.usda.gov/plum/