Israeli Prime Minister Benjamin Netanyahu told U.S. defense secretary Leon Panetta on Wednesday that time was running out for the international community to halt Iran's nuclear program by peaceful means, bringing back to the forefront of speculation the question of whether Israel will unilaterally strike against Iran's nuclear sites in the coming months, The Guardian reports. He explained: "However forceful our statements, they have not convinced Iran that we are serious about stopping them. Right now the Iranian regime believes that the international community does not have the will to stop its nuclear program." Panetta, the fourth senior U.S. official to visit Israel in recent weeks, told the prime minister: "We will not allow Iran to develop a nuclear weapon, period. We will not allow them to develop a nuclear weapon, and we will exert all options in the effort to ensure that that does not happen."