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MIKE SPRINGER/Staff photo.
Second grader Colin Kerr, center, works with others to build a Roman arch out of blocks as classmate James Sanfilippo, left, looks on 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.

140411MSPENGINEERING