From NPR News in Washington, I'm Nora Raum.The U.S. ambassador to the United Nations says the attack last weekon a US consulate in Libya was spontaneous.NPR's Jennifer Ludden reports that appears at odds with what Libyan officials are saying.Libya's president has told NPR that al-Qaeda was behind the attack,and used protests over an anti-Muslim video as a pretext.But U.N. Ambassador Susan Rice says so far the U.S sees no signs of pre-planned coordination.Still she tells Fox News Sunday, the FBI is investigating.We obviously did have a strong security presence and unfortunatelytwo of the four Americans who died in Benghazi were there to provide security.But it obviously wasn't sufficient in the circumstances to prevent the overrun of the consulate.Rice says the U.S. has stepped up security in other outposts.She also insists the wave of Mideast demonstrations this weekdoes not reflect a broad hostility toward the U.S. or its policies.Jennifer Ludden NPR News, Washington.On another television talk show this morning,Rice said the US takes no options off the table inpreventing Iran from acquiring nuclear weapons including a military option.But she told NBC's Meet the Press, there is still time for sanctions and diplomacy to work.Israeli Prime Minister Benjamin Netanyahu appeared on the same program he says time is running out.During the last 20 yards, you can't let them cross that goal line.You can't let them score a touchdown, because that would have unbelievable consequences,