National Blue Beret (NBB) is a National Cadet Special Activity in the Civil Air Patrol. The event is two weeks long and is set up so that the second week will overlap with the annual EAA AirVenture Oshkosh event. Participants are Civil Air Patrol cadet and senior members who must go though a competitive selection process in order to attend the event. Participants help conduct event operations, including flight marshaling, crowd control, and emergency services.