ADVANCE FOR USE SUNDAY, MAY 18 AND THEREAFTER - In this April 21, 2014 photo, Freeport native Alec Mangan,17, examines designs for radiation shields that he and his classmates at Illinois Math & Science Academy drew up for an engineering competition. His team was one of five finalist teams in a NASA Exploration Design Challenge earlier this year. (AP Photo/The Journal-Standard, Bill Rosemeier)
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