Russian Jet Crashes Kill at Least 135 BUCHALKI, Russia - A Russian airliner crashed and another apparently broke up in the air almost simultaneously after taking off from the same airport, officials said, killing all 89 people aboard and raising fears of a terrorist attack.    Authorities said rescuers found wreckage from a Tu-154 jet with at least 46 on board, about nine hours after it issued a distress signal and disappeared from radar screens over the Rostov region some 600 miles south of Moscow...