Andrew Harnik/ The Trump administration insists the answer is an unqualified yes — the nuclear sites were “completely and totally obliterated,” according to President Donald Trump. Yet questions remain about the efficacy of the attacks after an early intelligence assessment from the Defense Intelligence Agency reportedly concluded that the strikes may have only set back Iran’s nuclear program for months.

For those concerned about Iran becoming a nuclear-armed state, it’s essential to understand not just what the attacks by the US and Israel did to the country’s capacity to enrich uranium, but also what’s become of its existing inventory of atomic fuel.

CIA Director John Ratcliffe said Wednesday credible intelligence indicated that Iran’s nuclear program was “severely damaged” in recent U.S. air strikes.