Where the accord now stands, with Tehran taking another step away from the 2015 agreements to curb its nuclear development

President Rouhani says uranium gas to be injected into 1,044 centrifuges at underground nuclear site

New restrictions come on 40th anniversary of attack on US embassy, and as Iran ups enrichment, targeting senior military officers, chief justice, and advisers to supreme leader

Tehran's nuclear chief says domestically made centrifuge in development is 50 times faster than those allowed under 2015 accord

Under terms of 2015 nuclear deal, Tehran had committed to not using this array until late 2023; enrichment now at pre-deal daily capacity, country's nuclear chief says

After setting Friday deadline for an EU solution for skirting US sanctions, Tehran says failure will bring 'significant' new rollback of nuclear limits on centrifuges

Iranian president says third step away from 2015 nuclear deal will be of 'an extraordinarily significant nature' unless Europe comes up with solution

But intelligence sources tell Channel 13 news Tehran is also making overtures to Washington to renew talks in bid to deescalate