American Airlines Sunday resumed flying routes that use Russian airspace after having rerouted flights on Saturday due to its monitoring of "global geopolitical issues", a spokesman said. US President Donald Trump on Friday announced military strikes targeting Syrian President Bashar al-Assad's chemical weapons capabilities. On Saturday, American Airlines' Dallas-Beijing, Dallas-Hong Kong and Chicago-Beijing flights had stopped in Los Angeles to refuel because the routes cannot be flown non-stop without the use of Russian airspace. "The team at American regularly monitors global geopolitical issues and makes changes to aircraft routings when warranted," the spokesman said. "We operated our normal schedule April 15." Russian President Vladimir Putin warned on Sunday that further attacks on Russian ally Syria would bring chaos to world affairs.<br/>