Main issues in Iran nuclear agreement U.S. President Barack Obama and international negotiators are pushing for a framework deal with Iran over its nuclear programme by the end of March and a full accord by July URANIUM ENRICHMENT Iran could continue enrichment –used for peaceful energy or nuclearweapon – with 6,500 basic model centrifuges, if most of its uraniumstockpile is shipped to Russia. Dealaims to keep Iran one year awayfrom bomb. Iran’s enrichment to near- weapons-grade level halted in 2013 UNDERGROUND FACILITY Fordow enrichment site poses problem as it could not be eliminated militarily. Israel and U.S. hawks wantit dismantled, but compromise could see bunker restricted to research PLUTONIUM PRODUCTION Solutions for dealing with Arak heavy water reactor – which offers potential alternative route to bomb – include closing facility, turning it into light water reactor or reconfiguring plant to produce less plutonium TIMESPAN Full restrictions could be in place forat least 10 years, before gradual easing of conditions over last five years of deal. U.S. insists heightened inspections will not be scaled back SANCTIONS RELIEF Possible phased approach, involving suspension of some restrictions immediately, with others over time. Obama says calls by Israel and many in U.S. Congress for new sanctions on Iran risk scuttling diplomacy HISTORY OF DECEPTION U.S. officials say unanswered questions by UN inspectors about possible previous military aspects of Iran’s nuclear programme will haveto be addressed in agreement Main nuclear sites Tehran Fordow Bushehr Isfahan Natanz Arak IRAN IRAQ AFGHANISTAN SAUDI ARABIA The Gulf 400km 250 miles Source: Wire agencies Picture: Associated Press