One museum, two locations
Visit us in Washington, DC and Chantilly, VA to explore hundreds of the world’s most significant objects in aviation and space history. Free timed-entry passes are required for the Museum in DC.
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National Air and Space Museum in DC
Udvar-Hazy Center in VA
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Leather helmet waxy growth
Figure 5: Waxy growth emerging from the grain of the leather. (a): Leather helmet, proper left side. (b): Detail of waxy segments in the chinstrap buckle region. (c): X-radiographic image of chinstrap buckle region. (d): Detail of waxy growth near the leather loop. (e): Photomicrograph details of waxy growth, showing a segmented structure.
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