who was a former North Korean gymnast, managed to jump over a 10-ft border fence to escape.He was first picking up on thermal cameras on the North Korean side on the morning of November 2.South Korean authorities later caught him and interrogators are said to have made him perform acrobatic jumps to verify his claims until they were satisfied that he had gymnastic skills.A new system will now reportedly be designed to detect and stop potential defectors using ground vibration sensors that will ring alarm bells and alert the military..
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