Group effort
Volunteers smile for the camera before heading out to work on a host of projects during National Public Lands Day, Sept. 28, 2013, at Pine Flat Lake near Piedra, Calif. Pine Flat Lake is operated by the U.S. Army Corps of Engineers Sacramento District. (U.S. Army photo by Lucy Vang/Released)

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Photo by: Lucy Vang |  VIRIN: 130928-A-ZZ999-004.JPG