US President Donald Trump has issued a fresh warning to Iran, saying he may have to "destroy the rest of the country" if necessary. Hinting at further military action, Trump said, "You'll know soon enough." The warning comes amid continued tensions over Iran's nuclear programme and questions over Washington's next move after months of conflict. NDTV's Pradeep Datta reports on Trump's military options, the possibility of renewed escalation, pressure on Tehran to return to negotiations and the domestic political challenges facing the US President.