It stands to reason. The USA does not want Israel to be the only nuclear power in the Middle East. This would be dangerous considering the current turn of Israel to the right and the proliferation of political and religious extremists. In the end Iran, Turkey and Saudi Arabia will all have nuclear weapons. The alternative is for all these countries to get together and decide to give up this option. However, Israel will not even admit that it has nuclear weapons so there is no chance of such negotiations.
Suicide attacks kill at least 12 Iraqi troops near Ramadi (AP)