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A group of St Petersburg thrill-seekers broke into the high-security Leningrad Nuclear Power Plant, Saturday night capturing the vertigo-inducing event on a GoPro camera. The five young adrenaline junkies climbed onto the unfinished roof of the plant's new reactor, and went on to scale a 150-metre-high (492-foot) cooling tower. They managed to enter and exit the building unnoticed. The group have previously pulled similarly daring stunts, forcing their way into an aerodrome at Pulkovo Airport and photographing a Gazprom helicopter and a Russia Airlines plane.