Will Mr.Obama's Decision be Successful?

I know it is a bit old topic but last month Mr.Obama announced that by the end of 2014 the U.S. would reduce its troops in Afghanistan to less than 10.000.

His decision to reduce the troops is quite understandable since situation in Afghanistan has been bogged down. Especially for Mr.Obama who has been acclaimed for his commitment to the world security, keeping thounsands of troops in Afghanistan may sound contradictory.

In my opinion, I am concerned about the further terrorism in MIddle East as the U.S. will leave the place where peace is yet ensured. Although we have had the great number of victims in this war, I clearly notice that the U.S. has been taking the responsibility for the peacekeeping measures in Middle East and wonder who will take the responsibility instead of the U.S.

So the point is "Will Mr.Obama's Decision turn out well? or Lead to More Catastrophic Situations in Middle East?"

To me, the latter one is more likely.