A 20-year-old US National Guard member was killed and another critically injured in a daylight ambush near the White House. Authorities say a lone gunman armed with a .357 revolver opened fire without warning. The suspect, a 29-year-old Afghan national who served with US troops, faces first-degree murder charges. President Trump responded by calling for stricter border controls. On social media, he even said he would "permenantly pause migration from all Third World Countries."