Workers at the Advanced Earthquake Engineering Laboratory in Tokyo, left, are working to limit damage such as that seen at this hospital in northeastern Japan, right, following the huge earthquake that struck the region in 2011. (Source photos by Yuki Kohara and Shinya Sawai)
TOKYO -- Almost 170 meters into the Tokyo sky, engineers on the roof of a high-rise office building are working to make those sitting at desks in the 40 stories below feel safer.
The "pendulums" being installed in the Yebisu Garden Place Tower will -- hopefully -- not be noticed or even needed. But if an earthquake strikes Tokyo, these 1,350 ton devices will come into their own, making the building more resilient to violent shaking caused by seismic movements.