The Wings of Freedom Tour featuring a WWII vintage Boeing B-17 Flying Fortress, Consolidated B-24 Liberator, B-25 Mitchell and North American P-51 Mustang will be held Monday through Wednesday at the Pittsburgh-Butler Regional Airport, Penn Township. In honor of WWII veterans, the Collings Foundation presents the aircraft for a living history display as part of a 110-city tour. Visitors can explore the aircraft inside and out. Hours are noon to 5 p.m. Monday, 9 a.m. to 5 p.m. Tuesday, and 9 a.m. to noon Wednesday. Admission is $12 for adults and $6 for children younger than 12. For reservations and information on taking a 30-minute flight aboard these rare aircraft, call 800-568-8924.

Harmony Museum, 218 Mercer St., presents its 12th annual antique gun show 9 a.m. to 3 p.m. Saturday in Stewart Hall, 218 Mercer St. The museum is open 1 to 4 p.m. daily, except closed Mondays. Call 724-452-7341.