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MIKE SPRINGER/Staff photo.
Second graders, from right, Markus Silva, Noah Vicari and Zachary Zindle concentrate while attempting the delicate operation of putting the top blocks on a Roman arch during a "Young Engineers" program Friday at Plum Cove Elementary School in Gloucester. The program, presented by the Gloucester School District's elementary school science specialist John Madama, showed how engineering principles are related to basic principles in nature.

140411MSPENGINEERS