From Trump's sabre-rattling to the specifics of what's in his "armada" and what Washington is actually hoping to achieve, watch three of our experts talk through everything you need to know on the escalating tensions between Iran and the US.
- US correspondent James Matthews says the president is trying to appear strong after a difficult month of political retreats;
- Defence analyst Professor Michael Clarke says the "armada" Washington has sent "isn't that massive". What's there, Clarke says, "is powerful but not an armada";
- And our international affairs editor Dominic Waghorn says Trump is wielding "a big stick" to try and pressure Tehran into a deal about its nuclear and missile programmes - but Iran is a "much tougher nut to crack" than Venezuela.
Watch their analysis