Crank up “Ride of the Valkyries.” Nearly two dozen Marine helicopters – including new four-bladed UH-1Y “Yankee” Hueys and AH-1Z “Zulu” helicopters – took to the air over north San Diego County on May 4, flying in a chevron formation above Interstate 5 as they flew between Camp Pendleton, Calif., and Miramar Marine Corps Base in San Diego. Check out a video and report by the local CBS affiliate here. It was a sight that, in the pre-9/11 world, would have drawn numerous complaints of vibrating walls and interrupted conversations from residents in the hilly communities along the freeway. Still,…