A child puckers her lips on a window of a bus heading to a temporary housing location, following Russian invasion of Ukraine, near the North Railway Station in Bucharest, Romania, March 9, 2022. Inquam Photos/Octav Ganea via REUTERS DUBAI, March 10 (Reuters) – Iran on Thursday called on the United States to drop “unacceptable proposals” in talks on reviving Tehran’s nuclear deal with world powers, while Russia’s demands for guarantees from Washington complicated efforts to close an agreement. The 2015 deal that lifted sanctions on Iran in return for curbs on its nuclear programme was on the verge of being restored after 11 months of negotiations until Russia presented a new obstacle last week by demanding written guarantees from the United States that Western sanctions over its invasion of Ukraine would not affect its trade with Iran. Top security official Ali Shamkhani, secretary of Iran’s Supreme National Security Council, […]