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Breaking news now and our rescue operation in Wales has saved a man who was trapped in a cave for two days.
On our way in we had walked across a rock bridge which is spanning a very tall narrow passage in a cave.
It had been walked on many times before.
All three of us had walked across it to get to where we were.
Mark walked across it and got to the other side and when I stepped on it it just collapsed underneath me.
stuck underground for more than 50 hours with serious injuries.
The world just kind of went mad.
In a split second, George Lenain's life changed.
What was meant to be a routine trip into the UK's deepest cave system became an ordeal that threatened his life.
When a Stonebridge gave way, he fell 10 meters onto solid rock.
He'd spent 54 hours severely injured,
trapped hundreds of meters underground in the pitch black and freezing cold.
and it would take an army of extraordinary volunteers to bring him back to the light.
I'm Asya Vux, and from the BBC World Service, this is Lives Less Ordinary.
Personally,
the idea of waving goodbye to the sun and journeying deep underground to squeeze through waist-sized holes makes me want to scream.
But for George, a 41-year-old engineer from England, well, he lives for it.
For him, caving is like an opening to another world.
There's all sorts in there.