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War is raging in the Middle East after the US and Israel carried out strikes on Iran.
Keir Starmer has risked his special relationship with Donald Trump by initially blocking the US from using UK airbases.
Despite later changing his mind, what kind of tightrope is the prime minister walking - and can he stop Britain being sucked into war?
Niall is joined on this first-ever episode of This Is Why by Sky's security and defence editor Deborah Haynes and international affairs editor Dominic Waghorn.
Have you got a question for Niall? Email the show - why@sky.uk
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