text: FILE - In this Friday, Feb. 15, 2013 file photo provided by Chelyabinsk.ru, a meteorite contrail is seen over the Ural Mountains' city of Chelyabinsk, about 1500 kilometers (930 miles) east of Moscow, Russia. Scientists on Wednesday recovered what could be the largest part of this meteor from Chebarkul Lake outside the city. They weighed it using a giant steelyard balance, which displayed 570 kilograms (1,256 pounds) before it broke. (AP Photo/Chelyabinsk.ru, Yekaterina Pustynnikova