Southwest flight from Chicago diverts to Cleveland due to window issue

Here we go again... SWA can't win for loosing... In all of my years in aviation and working on the 737, I have never ever seen a side window crack like that in flight... There is only one thing that could cause that, and that is incorrect torquing procedures. I am certainly glad this is a 2 window set and only the outer gave way... This has the potential for a very bad outcome...