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 ...
Divyaditya Shrivastava is the CEO and founder of Paladin. To the uninitiated, a challenge coin is just a disc of metal. It could be attractive, perhaps weighty. It's something you might find in a ...
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