Biden says US 'continuing to suffer' from Trump's decision to pull out of Iran nuclear deal
By Allie Malloy
US is deeply skeptical and considering taking tougher action as Iran says it will return to nuclear talks
By Nicole Gaouette, Kylie Atwood & Jennifer Hansler
Biden and European leaders say they're 'convinced' Iran deal can be quickly restored
By Kevin Liptak & Maegan Vazquez