Inside Yemen's front-line city as Houthis battle for control

"This is the first drone," said the soldier accompanying us in south-western Yemen. "It's usually followed by an attack."
The buzzing sound overhead got louder as we took cover under the bushes, before climbing back into the vehicle and driving away.
Within about 10 minutes, the loud thuds of strikes followed, one after another, though it was unclear where they landed.
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