US Defense Secretary Ash Carter never expected to win over Prime Minister Benjamin Netanyahu about the merits of the nuclear agreement with Iran but tried to put a brave face on their sometimes blunt, closed-door exchange on Tuesday."We don't agree on everything. And the prime minister made it quite clear that he disagreed with us on with respect to the nuclear deal," Carter said at an airbase in Jordan."But friends can disagree."Since arriving in Israel on Sunday, Carter has sought to look beyond the political tensions between Israel and the United States that have only deepened since last week's announcement of a deal curbing Iran's nuclear program.