Trump speaking to the press ahead of his meeting on Syria
The US National Security Council is to meet on Thursday, while UK PM Theresa May has called a cabinet meeting.
Western leaders appear to be gearing up for air strikes, but Russian figures have said they will retaliate against any strikes on their ally Syria.
On Thursday, Kremlin spokesman Dmitry Peskov said it was “very necessary to avoid any steps which could increase tensions in Syria”.
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