Trump vows 'very serious retaliation' against ISIS after deadly Syrian ambush kills US soldiers

President Donald Trump sent a strong message to those accused of killing two U.S. Army soldiers and an American interpreter in Syria Saturday, noting the U.S. will retaliate against ISIS if forces are attacked again.

As Trump departed the White House for the Army-Navy football game Saturday afternoon, he said the country is mourning the loss of the soldiers and a civilian U.S. interpreter, who were ambushed by a lone ISIS gunman.