Students from Chief Joseph-Ockley Green Elementary School in Portland, Ore., conduct an experiment to create hot and cold chemical reactions while attending the STARBASE educational program held at the Portland Air National Guard Base, Ore., Dec. 9, 2013. STARBASE Academies help teach more than 75,000 students nationally each year in math and science education. (Air National Guard photo by Tech. Sgt. John Hughel, 142nd Fighter Wing Public Affairs/Released)

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