The Postal Service honors Native American culture with new Powwows Forever stamps, launched at the Gathering of Nations.

Even as the largest pow wow in the U.S. wraps up, people can take home a special commemorative stamp from the post office.

Stamps have enshrined the faces of presidents, celebrated the end of world wars and raised money for the treatment of diseases such as Alzheimer’s — now the U.S. Postal Service ...