21st SOS Flying Scarf Note: This item is currently in storage. This scarf is a traditional item worn to distinguish MH-53 units. Donated by Master Sgt. Robert E. Dinsmore. Click here to return to the Featured Accessions index. Find Out More Related Fact Sheets Sikorsky MH-53M Pave Low IV Note: The appearance of hyperlinks does not constitute endorsement by the National Museum of the USAF, the U.S. Air Force, or the Department of Defense, of the external website, or the information, products or services contained therein.