For the second time in 25 years, the U.S. Postal Service will issue a stamp honoring Americans who were prisoners of war or are listed as missing in action.

Postmaster General Marvin Runyon announced the new 32-cent stamp Thursday and said it will be issued on Memorial Day, May 29. The design of the stamp has not been completed, postal officials said."The Postal Service is proud to announce the issuance of a stamp remembering those who have not returned and to thank those who endured captivity and came back as heroes," Runyon said.

The agency also said it will waive its usual royalty fee for nonprofit organizations that want to reproduce the stamp on T-shirts, mugs and other products for use in fund raising.

Runyon has been mindful of the interests of veterans, pointing out that several of their organizations were consulted in the decision to issue the stamp.

It will be the second POW-MIA stamp issued by the post office. A 6-cent stamp in 1970 honored servicemen, prisoners of war and those missing and killed in action.