Iran's President Hassan Rouhani hopes to bring his country out of diplomatic isolation - but despite his new tone and the promise of increased flexibility on Tehran's nuclear program, some critics warn the West is falling into a clever trap.
ITV News Washington Correspondent Robert Moore reports.
More top news
Searches are continuing for victims, with around 600 people still missing and 3,000 left homeless after the disaster.
The man who drove the van that ploughed into pedestrians killing 13 people was unharmed and is still on the run, police believe.
Donald Trump has said American culture is being "ripped apart" by efforts to remove Confederate memorials from parts of the country.