Campers, ages 10-12, will learn about the history and principles of lighter than air flight as they build and "launch" a tissue paper hot air balloon model in the museum's 120-foot tall Missile Gallery. Cost is $10 per camper ($8 extra for camp t-shirt). 9 a.m.-3 p.m. More information at http://www.nationalmuseum.af.mil/education/camp/index.asp. Register online at https://www.surveymonkey.com/s/camps2014.