World's longest glass bridge abruptly closes after just two weeks

That didn't take long.
Just two weeks after China's Zhangjiajie Grand Canyon glass bridge opened to thousands of visitors, it had to close suddenly, with no re-opening date announced yet.
The 430-metre-long bridge, touted as the world's longest see-through bridge, is suspended 300-metres above a valley. Government officials shut it to visitors on Friday for an "internal system update."
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