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STORY: Blinken said Washington's preferred method of engagement with Tehran remained diplomacy, backed by economic pressure and deterrence.

"We continue to believe that diplomacy is the best way to verifiably, effectively, and sustainably prevent Iran from getting a nuclear weapon," Blinken told attendees at a conference of the American Israel Public Affairs Committee, or AIPAC.

But he added, "if Iran rejects the path of diplomacy then, as President Biden has repeatedly made clear, all options are on the table to ensure that Iran does not obtain a nuclear weapon."