Russia plane crash: 'Bomb planted on board'
Russia says a homemade explosive device brought down the A321 airliner in Egypt last month, killing all 224 people on board.
They have offered a $50m (£33m) reward for information on the Sinai plane attackers.
Most of the A321 passengers were Russian tourists flying home from the Red Sea resort of Sharm el-Sheikh.
Moscow Correspondent Steve Rosenberg reports.