U.S. Marine Corps Veteran Mike Bordner shares the challenge coin he keeps with him every day, as he visits Washington D.C.
Add Yahoo as a preferred source to see more of our stories on Google. For over 100 years, the challenge coin has been a symbol of esprit de corps among troops around the globe, tracing its roots back ...
Defense Secretary Robert Gates hands a challenge coin bearing his name to a service member at a forward operating base in Kandahar province, Afghanistan, in 2011. Photo by Jason Reed/Getty Images ...
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