On Oct. 26, noon to 5:30 p.m., explore the spooky side of air and space at Air & Scare, their annual Halloween event at the Steven F. Udvar-Hazy Center in Chantilly, Va. Participate in creepy crafts, spooky science experiments and other Halloween-themed activities. Arrive in costume to get into the Halloween spirit and enjoy safe indoor trick-or-treating. Allow for additional time for parking and security screening. Free; parking is $15. airandspace.si.edu.