Bomb Explosion Suspected Cause of Plane Crash in Egypt

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Egyptian and Russian investigators have yet to determine what caused a Russian civilian plane to crash on the Sinai Peninsula, killing all 224 people on board. The plane was carrying mostly Russian vacationers from Egypt's Red Sea resort of Sharm el-Sheikh back to St. Petersburg. A number of experts say there are signs that the crash was caused by an explosion during the flight. Zlatica Hoke reports.