Among 23 airports which have participated with the Screening Partnership Program, four airports, including Bert Mooney Airport which is named after an aviator from Butte, have withdrawn.
As of 2016, 23 airports have participated in the SPP. Below is a list of participating airports: Bert Mooney Airport 2015 2015 2015 2015 Yellowstone Airport Bozeman Yellowstone International Airport Glacier Park International Airport The airport name was changed in 1972 to honor Bert Mooney, an aviator from Butte who was the first to fly mail into Yellowstone National Park in 1935. 
