These types of mass shootings don't happen in other countries.
Notes from Wikiquote
"At some point, we as a country will have to reckon with the fact that this type of mass violence does not happen in other advanced countries. It doesn’t happen in other places with this kind of frequency." citation | "We are the only advanced country on Earth that sees these kinds of mass shootings every few months." citation | Cf. Obama in Paris on December 1st, 2015: "I say this every time we've got one of these mass shootings; this just doesn't happen in other countries." (Paris itself had just been "hit with a series of simultaneous terrorist attacks. The majority of 130 deaths were in mass shooting attacks, where the ISIS-affiliated terrorists attacked public places with automatic rifles." — as reported in citation | ).