DISPUTANTA - Have you ever heard of challenge coins? Maybe you or someone you know has earned one in recognition of extraordinary service. During a follow-up story interview with Three Brothers' ...

WASHINGTON — Since Bill Clinton occupied the White House, the commemorative medallions known as challenge coins have been stately symbols of the presidency coveted by the military, law enforcement ...

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 ...

WASHINGTON — Since Bill Clinton occupied the White House, the commemorative medallions known as challenge coins have been stately symbols of the presidency coveted by the military, law enforcement ...