US heart surgeon treats children lacking care in Libya's war

US cracks down on Mexico 'New Generation' cartel

Trump clamps limits on travel from Europe to US for 30 days

US, Canadian jets intercept Russian reconnaissance aircraft

U.S. general says Taliban fought IS with limited U.S. support

Kremlin says Trump not coming to Moscow for Victory Day

US starts troop pullout, seeks end to Afghan leaders' feud

US begins troop withdrawal from Afghanistan, official says

US judge: Iran liable in disappearance of retired FBI agent

US denounces Afghan bid for parallel government

US, Brazil sign agreement enabling military sales

Royal farewell: Harry, Meghan on final duty before new life