Obama blocks Chinese wind farm due to national security concerns WASHINGTON (Reuters) - President Barack Obama on Friday blocked a Chinese company from building wind turbines close to a Navy military site in Oregon due to national security concerns. The privately-owned Chinese company Ralls Corp, which had been installing wind turbine generators that had been made in China by Sany Group, will now be forced shelve its plans and divest its interest in the four wind farm projects it acquired earlier this year. The projects were all within or in the vicinity of restricted air space at a naval weapons systems training facility in Oregon, the administration said in announcing Obama's decision. Reporting By Rachelle Younglai; Editing by Vicki Allen