"It is absolutely clear that words are not sufficient," Obama said on Monday. "We have to have actions that give the international community confidence that, in fact, they are meeting their international obligations fully and that they are not in a position to have a nuclear weapon."
In the latest indication of Tehran's new approach to Washington, Iran's semi-official Fars News Agency reported that Rouhani wants to establish direct flights between Iran and the United States.
And in the latest indication of Iran's continuing problems with Israel, the Israeli government said over the weekend that it had arrested an Iranian-born man and accused him of spying for Tehran.
According to the Israeli government, the alleged spy was carrying photos of various sites, including the U.S. Embassy in Tel Aviv.
On Tuesday, the Iranian news agency cited a Foreign Ministry spokeswoman who rejected the assertion as "baseless."