U.S. Defense Secretary Chuck Hagel, right, and Israeli Defense Minister Moshe Yaalon pay their respects at the tomb of assassinated Israeli prime minister Yitzhak Rabin, as they visit the Mount Herzl ... more 
U.S. Defense Secretary Chuck Hagel, right, and Israeli Defense Minister Moshe Yaalon pay their respects at the tomb of assassinated Israeli prime minister Yitzhak Rabin, as they visit the Mount Herzl national cemetery in Jerusalem on Friday, May 16, 2014. Hagel pledged to Israeli leaders Friday that the U.S. "will do what we must" to prevent the Jewish state's greatest fear of a nuclear-armed Iran. (AP Photo/Mandel Ngan, Pool) less 
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Associated Press | Photo By Mandel Ngan, Pool
Fri, May 16, 2014 7:00 AM EDT