After decades of threats, Israel launched an audacious attack on Iran, targeting its nuclear sites, scientists and military leaders. Here’s what to know about its controversial nuclear program.

The International Atomic Energy Agency declared Iran was in breach of its Nuclear Non-Proliferation Treaty obligations by failing cooperate with an probe into undeclared nuclear material and activities at multiple sites.

U.S. President Donald Trump said on Thursday an Israeli strike on Iran "could very well happen," and a senior Israeli official told the Wall Street Journal it could occur as soon as Sunday unless Iran agrees to halt production of material for an atomic bomb.