Israeli Prime Minister Benjamin Netanyahu insists that Iran will not stop its nuclear program unless economic sanctions are backed with a "credible military option."

Netanyahu says the only time the Iranians stopped their nuclear development when they thought they were threatened with a military strike.

Netanyahu said the Iranian goal is to build nuclear weapons. He said they would stop "if they thought they were facing a credible military option at the end of the tunnel."

He told foreign correspondents in Jerusalem Tuesday, "if there is credible military option you won't need to use it." Iran denies making nuclear weapons.

He did not say Israel would carry out a military strike. Israel considers Iran a strategic threat.