Being here, at the Texas School Book Depository Building where Lee Harbey Oswaldallegedly shot President Kennedy at Dealey Plaza in Dallas, makes me realize that one extremist can change things. And the thing is, there are so many. 

   

  

The grassy knoll: 

The contrete steps steps where Zapruder filmed:
  

X marks the spot:

  
The window from the street. 

  
Zapruder’s vantage point.  People still gather. 

  

  
It only takes one. 

Manage your messaging. 

Radicalism comes easily.