Western strikes against the Syrian regime in retaliation for the use of chemical weapons could affect Bashar al-Assad's military apparatus and push Russia to return to the negotiating table, but also spark tensions in the region, or even a US-Russia confrontation. US President Donald Trump has been weighing his military options, British Prime Minister Theresa May held an emergency cabinet meeting and the priority for Russia's Ambassador to the UN is "to avert the danger of war."