WABI: Maine Troop Greeters add online database for challenge coins

WABI: Maine Troop Greeters add online database for challenge coins. “More than 6,000 challenge coins line the wall at Bangor International Airport. It’s a collection that has been growing since 2003 as returning troops leave the tokens that represent their military unit. Now, it’s large enough that the greeters have added an online database to help people find specific coins.”