Here is a link to an article by Seymour Hersh in the London Review of Books. It shows that Turkey was behind the the sarin nerve gas attack in Syria which they carried out in order to get the U.S. to begin bombing.
Hersh has appeared on Democracy Now discussing this:
The nerve gas attack in Syria which Obama claimed crossed his "red line", which he was going to use as an excuse to launch a massive bombing campaign on Syria, was a false flag operation orchestrated by Turkey to provoke a US attack.
It'll be interesting to see how MSNBC and the "humanitarian interventionists" who loved Hersh when he was exposing Bush's crimes will respond to this. Rachel Maddow couldn't keep from smiling as she talked about how Syria would be destroyed. My guess is they'll ignore it, but you never know.