Castle Air Museum held its 18th annual Open Cockpit Day from 9 a.m. to 5 p.m. Sunday at the museum, 5050 Santa Fe Drive in Atwater. Five thousand to 6,000 visitors showed up and more than 100 museum volunteers worked in food booths, aircraft displays and the gift shop. The event included the dedication of the newest aircraft, the North American RA-5 Vigilante reconnaissance bomber, one of 11 in existence. More than 35 of the 60 aircraft at the museum were open for viewing. Law enforcement and military vehicles were also on display. Children’s activities included model airplane building and a bounce house.