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 ...

President Donald Trump has never shied away from shaking up traditions and the so-called presidential “challenge coin” seems to be no exception. The little mementos that the commander in chief has ...

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 ...

Special challenge coins are being distributed among US Secret Service personnel and their families, who are expressing frustration at the requirement they work without pay during the partial ...