STEM freshmen learn their lesson at Old Hickory Dam
Stratford STEM Magnet High School ninth graders watch a six-barge tow navigate through Old Hickory Lock Feb. 27, 2014 during a field trip at the U.S. Army Corps of Engineers project located on the Cumberland River in Old Hickory, Tenn.

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Photo by: Lee Roberts |  VIRIN: 140227-A-EO110-009.JPG