John McLeod explains the use of the Coast Guard Research and Development Center's zero-length photometry mirror, Thursday, Nov. 10, 2016, in New London, Connecticut. Students from the Interdistrict School for Arts and Communication learned about the front-surfaced spherical mirror as part of a STEM outreach tour of the RDC. (

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Keywords: -length, archive, armed, arts, center, coast, communication, defence, development, forces, guard, interdistrict, isaac, military, mirror, photometry, rdc, reportage, research, school, servicemen, spherical, stem, usa, uscg