Former U.S. Secretary of State Hillary Clintonaddresses the press after attending the annual Women's Empowerment Principles event at the UN headquarters in New York on March 10, 2015. Hillary Rodham Clinton, a potential 2016 U.S. presidential contender, on Tuesday defended her use of personal email account for official communications, saying it was "for convenience" and "allowed". (Xinhua/Niu Xiaolei)
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