Ayat Yousef and Chyann Gross, Kecoughtan High School students, learn about rotational frequency at the MathAlive! exhibit at the Virginia Air and Space Center in Hampton, Va., Oct. 20, 2016. The traveling exhibit provides visitors with 40 different interactive activities geared toward science, technology, engineering and mathematics, or STEM, with video games, sports, and design. (U.S. Air Force photo by Airman 1st Class Kaylee Dubois)