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' ...

JOINT BASE MYER-HENDERSON HALL, Va. - For active duty and retired servicemembers, it is the currency of past days of deployment or of military milestones. This custom-made currency is awarded through ...

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 ...

According to Pearlman, most people begin their collecting journey with everyday coins found in circulation. But knowing what ...