One of my ex-girlfriends had an autistic son. We had to install window film that would prevent the glass from shattering (he would bang his head on anything close when triggered); it seemed pretty crazy to me when this first happened they wouldn’t have something similar. Cheap, and effective. Blunt force wouldn’t compromise the glass, but a piercing object(think pickaxe)would. With a decent film bullets would certainly penetrate but not break up the whole sheet of glass. I’m not suggesting anything other than the hotel not having something of that sort would baffle me.
Lotsa glass missing from those windows!
Where's the pictures of the fragments down on the roof/ground?