(Smithsonian Institute ) This Coast Guard MH–65 Dolphin is just one of the many helicopters to be displayed.
Smithsonian Presents Super Science “Helicopter Edition”
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AUGUST 07, 2012

The Aug. 11 program—“Helicopters”—will be the most ambitious Super Science Saturday yet, with helicopters from the U.S. Coast Guard, Fairfax County Police Department, Army National Guard and privately owned helicopters flying in for one day only.
Read more: newsdesk.si.edu