Barack Obama has said Tuesday is willing to open dialogue with Iran on its nuclear programme, after conciliatory signs from the country's new President Hassan Rouhani.
However, the President said that Iran would have to demonstrate its own seriousness by agreeing not to "weaponise nuclear power".
"There is an opportunity here for diplomacy," Obama said in an interview with the Spanish language television network Telemundo.
"I hope the Iranians take advantage of it. There are indications that Rouhani, the new president, is somebody who is looking to open dialogue with the West and with the United States, in a way that we haven't seen in the past. And so we should test it."