Update: White House says violence is not the answer in Syria but attack on Assad's inner circle shows "window is closing." White House says international community needs to act in a unified way.
White House says it has no information on Syrian leader Bashar al-Assad's whereabouts; White House goes on to say the U.S. is closely monitoring Syria's military facilities and believes its chemical stockpile remains under government control.
ISTANBUL Three suicide bombers opened fire then blew themselves up in Istanbul's main international airport on Tuesday, killing 36 people and wounding close to 150 in what Turkey's prime minister said appeared to have been an attack by Islamic State militants. | Video