Trump open to 20-year Iran nuclear ban but demands ‘real guarantee’

US President Donald Trump on May 15 spoke about Iran's nuclear programme aboard Air Force One, triggering fresh debate over Washington's stance on Tehran's nuclear ambitions.

Speaking to reporters on Air Force One, President Trump also claimed to have "wiped out" Iran's armed forces.

Iran is finished, should make deal to end war: Trump after talks with Xi Jinping

The allowance for Iran to enrich uranium at any point in the future — even decades out — marks a shift for the president.