United Nations inspectors visiting the sites of suspected chemical attacks in Syria were forced to turn back in Damascus when they reportedly came under sniper fire. The New York Times is reporting today that the Obama administration is now "confident" chemical weapons were used, and is weighing what to do next. NBC News' Ayman Mohyeldin, Kristin Welker and Rep. Eliot Engel, D-N.Y., join the conversation.Aug. 26, 2013