Meanwhile, former President Jimmy Carter has revealed he believes Israel has at least 150 nuclear weapons in its arsenal. The Israeli government has never acknowledged its nuclear weapons program. But its existence has been widely known since the scientist Mordechai Vanunu leaked government documents in the 1980s. Carter’s comments mark the first time a former US president has spoken on the number of Israel’s atomic weapons. Carter also called Israel’s occupation of Palestinians “one of the greatest human rights crimes on earth.”