Iran could agree to dilute its most highly enriched uranium in exchange for all financial sanctions being lifted, its atomic chief said on Monday, one of the most direct indications so far of its position at talks with Washington. US and Iranian diplomats held talks through Omani mediators in Oman last week in an effort to revive diplomacy, after US President Donald Trump positioned a naval flotilla in the region raising fears of new military action. The talks follow a crackdown on anti-government demonstrations in Iran last month when thousands of people were killed, ‍the biggest ⁠domestic unrest since the 1979 Islamic Revolution. Trump joined an Israeli bombing campaign last year and hit Iranian nuclear sites. He also threatened last month to intervene militarily during the protests but ultimately held off. Washington has demanded Iran relinquish its stockpile – estimated last year by the UN nuclear agency at more than 440 kg – of uranium enriched ​to up to 60% fissile purity, a small step away from ‌the 90% that is considered weapons grade. Story …