Dubai, July 19 -- The US military on Saturday announced its first troop deaths due to direct Iranian fire since the opening days of the war, saying two were killed and another was missing in an attack on a base in Jordan. They were killed Friday as the US and partner forces defended against ballistic missile and drone attacks, a statement said. Four other service members were medically evacuated to Jordanian hospitals and later discharged. The dead were not identified. Minutes earlier, Iran's supreme leader warned of "unforgettable lessons" if the US keeps attacking the Islamic Republic. The remarks read out on state TV and attributed to Mojtaba Khamenei also called President Donald Trump's signature "worthless and invalid." The comments came hours after a negotiator said Tehran was suspending its commitments to the interim deal signed about a month ago and aimed at permanently ending the fighting. Tehran's declarations snapped another fragile thread as the war shows no end in sight. Now Khamenei warns of "lessons" not only from Iran but its armed proxies in the region, calling them the "Axis of Resistance."...