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

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 ...

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, ...