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Flying lab

Juan Carlos Gomez, left, and Steven Walsh, college students from New Mexico and Alaska, respectively, take samples of the air outside the DC-8 used in the NASA and University of North Dakota program. FOR THE RECORD: Airborne science program: A July 25 article about a NASA-run science program incorrectly referred to the agency's DC-8 plane as small. It exceeds the Federal Aviation Administration's upper limit of 12,500 pounds for small aircraft. The caption with a photo accompanying the article incorrectly identified a student as Steven Walsh. It was Andrew Hart of the University of New Hampshire.Spencer Weiner / Los Angeles Times