President Obama has indicated in the New York Times that Iranian with nuclear weapons is "inevitable"--so he himself has no plans to use military force to prevent that inevitability his own intended inaction helps to make inevitable in the first place. It is up to Israel but without a preemptive tactical low-yield (20 kiliton) attack on key facilities, an Israeli conventional attack seems bound to fail. Apparently, however, for the American President, the inevitability of Jewish housing in Jewish neighborhoods in East Jerusalem--well, that's something to be upset about.
At least eight killed, 16 wounded in two car bombs in Iraq, police says (Reuters)
from the article: Iran vows to strike Israel immediately if attacked