Prime Minister Binyamin Netanyahu Sunday warned that Israel’s response to anyone challenging its security would be tough and painful. US Undersecretary of State Wendy Sherman, head of the American team of negotiations in Geneva, has arrived in Israel to brief the prime minister on those talks. Secretary of State John Kerry answered Israel’s charges in an NBC interview by saying: “We are not blind and I don’t think we’re stupid. I think we have a pretty strong sense of how to measure whether we are acting in the interests of our country and of the globe. Nobody has talked about getting rid of the current architecture of sanctions. The pressure on Iran will remain.