Proposed SUA could affect 20 airports in four states

The Air Force wants to create a mega complex of special-use airspace that would span four states and affect more than 20 general aviation airports. The proposed expansion of the Powder River Military Operations Area would claim airspace in Montana, Wyoming, North Dakota, and South Dakota and cover an area 300 nm by 165 nm from an altitude of 500 feet agl through Flight Level 600. Read more on AOPA Online.