FILE - In this July 4, 2009 file photo, military personnel join the march during an annual gay pride parade in central London organized by Pride London, the lesbian, gay, bisexual, and transgender charity. Most of America's closest allies opted years ago to allow gays to serve openly in their militaries. As U.S. policymakers wrestle with the issue, there's sharp disagreement over whether those allies' experiences are relevant to the debate. (AP Photo/Akira Suemori, File) (AP)