One of the most popular is through collecting challenge coins. Challenge coins are signs of unity among die-hard riders, often intended to symbolize loyalty and shared experience within motorcycle ...

"Challenge coins" are little custom-made tokens used by military and police to commemorate campaigns and build team spirit. Most of them are innocuous, some are kind of silly, but many of them ...

A new set of challenge coins minted by the state of Montana — and designed by a Montana State University student — are ...