A search is underway of the Housatonic River in New Milford.  Emergency responders were called to the river late yesterday afternoon on a report of two men in their 20s struggling to swim.   New Milford police say the Bronx men were picnicking with a group in a recreational area off Route 7 when one began to struggle in the water.  The second tried to help and both were swept away.  Rescue crews from Sherman, New Milford, Gaylordsville, Kent, Washington, Goshen, Connecticut State Police and the Department of Energy and Environmental Protection Environmental Conversation Police joined the search.