After 17 days of tough negotiations, diplomats on Monday night agreed on a landmark deal aimed at preventing Iran’s nuclear program for at least a decade. Negotiators from Iran, the United States, France, Britain, Germany, Russia and China managed to strike an agreement that resolves the security threat by applying unprecedented scrutiny to Tehran’s nuclear complex. The agreement also includes scaling back nuclear activities in Iran.

The deal means that Iran will reduce its inventory of centrifuges used to enrich uranium from 19,000 to 6,000. The country will cut its stockpile of low-enriched reactor-grade uranium from 22,000 to 660 pounds. Iran’s nuclear sites will also come under the United Nations heavy scrutiny with inspectors having access to sites and being given the right to interview technicians if there is evidence of illegal activity in the area.

United States critics say that there is little chance of blocking a nuclear deal, however undermining it politically gives hope that a future president may abandon it.