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• As part of the annual celebration, the South Dakota School of Mines & Technology offered attendees the chance to talk live with a School of Mines scientist a mile below the Earth's surface at the lab in the former Homestake mine.
• Cabot-Ann Christofferson, a chemistry faculty member serving as deputy director of the Majorana Project at Sanford lab, discussed the experiment aiming to create the purest copper in the world. The experiment is searching for evidence of neutrinoless double-beta decay, and its detection could help measure the mass of the neutrino.
• Graduate students were on hand to answer questions about their underground research endeavors.
• The events were free and open to the public.
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AP News in Brief
Kerry arrives in Vienna as world powers, Iran appear set for nuclear talks extension
• VIENNA (AP) -- U.S. Secretary of State John Kerry and fellow foreign ministers are adding their diplomatic muscle to nuclear talks with Iran, with a target date only a week away for a pact meant to curb programs Tehran could turn to making atomic arms.
• Deep differences separate the two sides and six world powers and Iran appear set to extend their talks past July 20. That would give more time to negotiate a deal that would limit the scope of such programs in exchange for a full lifting of nuclear-related sanctions imposed on Tehran.
• Kerry arrived Sunday. Britain, France and Germany also sent their foreign ministers to Austria's capital for talks over the next few days, as has Iran. But the top diplomats from China and Russia are sending lower-ranking officials instead. That may reflect their view that an extension is unavoidable.
• Still, the most important disputes over how deeply Iran must cut its nuclear program are between Washington and Tehran, so Kerry's presence is crucial. He will be able to talk directly to Iranian Foreign Minister Mohammad Javad Zarif, who is at the Vienna negotiations.
• Iranian Deputy Foreign Minister Abbas Araghchi spoke Saturday of "huge and deep" differences. But he told Iranian TV that "if no breakthrough is achieved, it doesn't mean that (the) talks have failed."
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