It took Bin Ladin ten years to plan his attack in NY and DC.  The CIA and FBI received plenty of tradecraft warning that Bin Ladin was going to reign terrorism on American soil and he did.  Killing Bin Ladin obviously wasn't going to end Islamic extremism.  Americans are foolish for blaming each other out of bigotry, racism, and good old fashion fear-mongering.  A nation divided will indeed fuel the flames of terrorism.  I don't believe for a moment that Mateen carried out his assault in Orlando because of Allah.  He carried out his assault due to extreme mental illness and self-hatred.  The Mateen's of this world will gun down or set off explosives and take as many innocent people with them.  That's the reality.  We're watching it unfold and appear helpless to stop it.