Despite attempts by Russia to forestall US airstrikes and protests on his doorstep President Obama continues to make the case for action in Washington.
Senators are gathering for discussions ahead of a vote which could define his Presidency.
ITV News Washington Correspondent Robert Moore reports:
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In its first test, the 30-kilowatt military laser burned through a trucks engine in a matter of seconds.
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The mother of a boy excluded from taking part in World Book Day when he dressed as Christian Grey has insisted the outfit was his idea.