By William James LONDON (Reuters) - The Labour Party said on Monday its MPs could vote according to their consciences on air strikes against militants in Syria, a move which may hand Prime Minister David Cameron the parliamentary majority he needs. Cameron believes it is time to join other Western powers in bombing Islamic State, saying Britain could not subcontract its security to other countries after the militant group claimed responsibility for killing 130 people in Paris this month. By allowing the so-called 'free vote' - breaking with a tradition for party leaders to instruct MPs on how to vote on major decisions, Corbyn has moved to quell a rebellion in Labour, which had threatened to engulf his two-month leadership.
World leaders vowed Monday to save mankind from catastrophic climate change as an historic summit opened with the "hope of all of humanity" laid on their shoulders, but fault lines quickly emerged. The heads of more than 150 nations -- a record -- kicked off 12 days of talks in search of an elusive pact that would shift the world economy away from its heavy use of fossil fuels blamed for global warming. "Never have the stakes of an international meeting been so high, because it concerns the future of the planet, the future of life," French President Francois Hollande said in an opening speech.