Every time Huw Lloyd ventures on to the peaks above his farmhouse, his thoughts return to a strange night almost 40 years ago - and a UFO mystery that has never been explained.
Huw, then 14, had been watching television with his two older sisters and a neighbour when their hillside home in North Wales was rocked by a "violent thud" that knocked him from his chair.
Within minutes four police officers were at his front door, asking if his father could drive them into the inhospitable Berwyn Mountains in a farm vehicle.
They said a plane had crashed.
Huw's father was out so the teenager, who had been driving Land Rovers around the family farm for years, volunteered to take them.
Within minutes he was at the wheel of his dad's Land Rover, driving the officers through the gloom.
Huw said: "Our neighbour, a retired RAF officer, sat in the -passenger seat and the policemen were in the back."
As the Land Rover nosed carefully along the track that wound through thick forests and bogs, the officers kept colleagues informed of their progress via their radios.
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