Stop trying to blame immigrants for our problems. We cannot predict when and where and by whom these attacks will occur. We have had our own share of American born terrorists. It is a problem that is hard to solve. But blaming immigrants will not solve this problem at all. Mental health plays a big role in this. People also saying I had a feeling something was up with that person may need to take notice. Terrorism exists everywhere. I think we need to ask what role do we play in it before we attack a group searching for a better life.