No one will stop Iran from acquiring a nuclear weapon. The US will not attack Iran, fearing a new costly conflagration in another ME country. It will just become the new status quo. Unlike in Iraq, Israel will not attack Iran. Iran has millions of soldiers and 2 proxies next to Israel that can make life hell for Israel. Iran will consider an attack by Israel an act of war and respond accordingly. Anyone who doubts this is naive.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Barak: Iran poses no immediate existential threat to Israel