Kerry, Hagel: U.S. won't be fooled by Iran "I did not interpret Prime Minister Netanyahu's comments as suggesting that we are being played somehow for suckers," Kerry said. I understood it to be a warning; don't be played. Iran does not recognize Israel and in the past has said the Jewish state must be destroyed. Israel sees an Iranian nuclear weapon as an existential threat, and Netanyahu told the United Nations on Tuesday that Israel would act alone to prevent a bomb if no other nations were willing to do so. That was a direct challenge to the Obama administration, which has repeatedly pledged to take military action against Iran if diplomatic efforts fail. Nothing about the new diplomatic effort with Iran changes that bottom line, said Kerry and Hagel, who are in Japan for meetings with their defense and foreign affairs counterparts. Kerry praised Rouhani for bucking hardliners at home to reach out and propose substantive new talks about an advanced nuclear program. The United States fears the program is aimed at a bomb; Israel says it is certain of that intent. Iran has pledged to bring an offer to disarmament talks later this month in Switzerland. U.S. negotiators hope the offer will include a willingness to accept limits on Iranian enrichment of uranium, the fuel that can be used either for power plants or weapons. Iran is seeking relief from crushing economic sanctions that have been imposed by the international community as its nuclear program advanced. Iran's new willingness to talk led President Obama to call Rouhani as the Iranian leader left the United Nations meeting last week - the first such direct contact between a U.S. leader and an Iranian one since before the 1979 storming of the U.S. Embassy in Tehran. Hagel said he understands Israel's concern over the turnabout, but added, "I have never believed that foreign policy is a zero-sum game." "Engagement is not appeasement, it's not surrender, it's not negotiation," Hagel said. Aren't we wiser if we can find ways to resolve disputes, recognizing the danger, being very clear-eyed and keeping the strongest military in the world? Netanyahu used his U.N. address on Tuesday to pick apart the Iranian leader's overture, calling Rouhani a "wolf in sheep's clothing." Rouhani's effort, Netanyahu said, was nothing but a "charm offensive" to get the West to ease sanctions. In an interview with NBC on Wednesday, Netanyahu went further. Iran's supreme leader, Ayatollah Khamenei, heads a "cult" bent on Israel's destruction, Netanyahu said, and Khamenei, not Rouhani, will decide the country's nuclear fate. Kerry said Iran's assurances - that it seeks only peaceful nuclear energy, not a weapon - will be put to the test at the negotiating table. "I can assure the prime minister, as I would assure all the people of the world, and particularly Iranians, there is nothing here that is going to be taken at face value," the chief U,S, diplomat said Thursday. "We have an obligation," Kerry said. It would be diplomatic malpractice of the worst order not to examine every possibility . . . before you ask people take military action or do what you have to do.