Defense Secretary Ashton Carter testifies on Capitol Hill in Washington in this July 7, 2015, file photo. The expected launch of new rules allowing transgender individuals to serve openly in the U.S. military is drawing concerns from senior military leaders who believe the Pentagon is moving too fast and has yet to resolve many details and questions. The Pentagon plans to unveil the new regulations in the next day or two. (AP Photo/Carolyn Kaster, File)
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