A couple stops on the Las Vegas Strip October 4, 2017, to look up at the two broken window in the Mandalay Bay hotel from which killer Stephen Paddock let loose the worst mass shooting in modern American history on October 1, 2017 at a country music festival across the street in Las Vegas, Nevada leaving 58 dead and over 500 injured.
Mass killer Stephen Paddock used semi-automatic weapons which he modified with "bump-fire stock" to make them fire much like a fully automatic weapon. / AFP PHOTO / Robyn Beck        (Photo credit should read ROBYN BECK/AFP/Getty Images)