Ten coins are arranged into a pyramid, and the challenge is simple: flip its direction by moving only three coins. Most ...

Challenge coins are a longstanding staple of the US military. They’re awarded to only the best of soldiers for going above and beyond the call of duty. If you ever see someone with a challenge coin, ...

Editor’s note: This article was originally published on Nov. 23, 2020. Challenge coins are an interesting military tradition. Some folks will visibly swell with pride as they present their collection ...