Iran and US expand military readiness amid nuclear negotiations

Iran has reinforced key military and nuclear facilities with concrete and earth barriers as the United States increases its military presence in the Middle East and President Donald Trump renews threats of action if talks fail.

New satellite images published by Reuters and verified by BBC Verify show extensive construction at sensitive Iranian sites, including the Parchin military complex southeast of Tehran. Analysts say a newly built structure at Parchin has been encased in concrete and covered with soil...