Iran and the United States are in discussions to extend their ceasefire so as to start negotiations on issues including Tehran¡¯s nuclear program, where Washington ?insists Iran must not be able to make a nuclear weapon.

While much of Iran¡¯s uranium enrichment infrastructure was destroyed or badly damaged when Israel and the U.S. bombed it in June, a large part of the highly enriched uranium it amassed is thought to have survived. That is the biggest U.S. concern ahead of nuclear talks.

On Friday Trump said in a social media post that Iran must agree that the enriched uranium buried underground after earlier U.S. strikes ?be ¡°unearthed¡± and destroyed in coordination with Iran and the U.N. nuclear watchdog.