After all the conspiracy theories about the 9/11 attacks in september 2001 that have been seen around the internet, here is the official technical explanation of how fire could bring down the 47 stories Salomon brothers building, in 6.5 seconds. The skyscraper went down many hours after the attacks, simply because it took some time for the fire to destroy the metallic structure. This video was made by CBS and the NIST (National Institute of Standards and Technology) a few days ago.   The 3D videos from NIST can be seen here. More Info NIST: http://www.nist.gov/public_affairs/releases/wtc082108.html

The Bahrain World Trade Center (BWTC) that is currently under construction installed the world’s first integrated wind turbine. This new building should launch as the "Kingdom’s leading mixed-use commercial development". It will have three integrated wind turbines. This is the first time anywhere in the world that large-scale wind turbines are part of a building. Lifting and installation of the turbine propellers began at the end of last week, and all turbines will be fully operational as soon as the building will be completed.