The United States Postal Service is celebrating its 250th anniversary with two new stamps and a retired stamp voting contest.

Both of the stamps are being issued as Forever stamps, which will always be equal in value to the current First-Class Mail one-ounce rate.

WASHINGTON — The U.S. Postal Service on Wednesday marked its upcoming 250th anniversary with the release of new commemorative stamps, including an exclusive, modernized version of the nation's ...