US President Donald Trump threatened Iran with bombing and secondary tariffs if they did not come to an agreement with the US over their nuclear program. Trump's comments came after Iran rejected direct negotiations with Washington. It is unclear whether the bombing would be carried out by US planes alone or in coordination with Israel. Iran has responded by saying that they will not engage in direct negotiations with the US, but are open to indirect negotiations. Trump also threatened secondary tariffs on both Russia and Iran, but did not provide further details.