The Legion d'honneur is handed back after France joined the US and Britain in air strikes on Syria.
Mohammed Zammar, who was linked to the 9/11 attackers, is reportedly being held in northern Syria.
The head of Mashhad's Islamic guidance department had authorised a concert at a shopping centre.
Broadcast time 05:06 BST - 05:30 BST
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Five families compete from their living rooms
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