Sources in France suggest the man arrested in connection with French Alps shooting is the brother of Saad Al-Hilli - Zaid. He was arrested at an address in Chessington on suspicion of conspiracy to commit murder
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Barack Obama has returned to the political spotlight, campaigning for Democratic candidates ahead of upcoming elections.
The prime minister said there was a "clear and urgent imperative" to give new impetus to stalled negotiations.
Pollution claimed nine million lives in 2015, with air pollution from vehicles and factories accounting for 6.5m deaths, researchers found.