A pilot-in-training who failed to maintain a Russian passenger jet’s speed was partly to blame for the jet slamming into a Ukrainian field last year, killing all 170 on board, a transport commission said Saturday. The Pulkovo Airlines Tu-154 returning to St. Petersburg from the Black Sea went down on Aug. 22, 2006, near the southeastern Ukrainian city of Donetsk after its crew sent distress signals as a storm raged in the area. The plane’s 10 crew members and 160 passengers were killed. Full Story