A military helicopter hovers over the mountain cluster as a passenger jet passes by prior to the 2014 Winter Olympics, Tuesday, Feb. 4, 2014, in Krasnaya Polyana, Russia. With militant groups threatening to attack during the next few weeks, security and the safety of competitors and visitors to the coastal area and in the nearby mountains that will host the events has become both heightened and inescapable. (AP Photo/Dmitry Lovetsky)
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