Saudi Arabia’s energy minister has threatened a ‘serious’ response to the deadly Houthi attacks on Riyadh’s international airport. Flights remain suspended and are expected to remain so for days.
The Houthis said they launched the attacks in retaliation for "brutal Saudi aggression" against areas they control in western Yemen.
The BBC’s security correspondent Frank Gardner examines how it is that Saudia Arabia – which spends billions on its defence – can not stop the Houthis from attacking its people.
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