Park Host Volunteer Susan Fehr, top, looks on as Ranger Heather Wright fits a young man with a brand new life jacket during Life Jacket Trade-in Day, May 24, at Stanislaus River Parks, the U.S. Army Corps of Engineers Sacramento District park at Knights Ferry, Calif. Sponsored by the California Department of Boating and Waterways, the exchange offered a new life jacket in return for any used life jacket.