with<u+00a0>western and iranian negotiators racing toward a june 30 deadline<u+00a0>to hammer out the final details of a nuclear deal, the mood is tense. just take a look at twitter, where secretary of state<u+00a0>john kerry<u+2019>s senior communications adviser<u+00a0>marie harf<u+00a0>is feuding with a reporter.
kerry adviser marie harf in twitter fight over iran nukes
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