Why don't big terrorist attacks like in France or Belgium happen in the U.S.?

People here would shoot back, whether they are off duty or on duty cops, soldiers, or private citizens it would be difficult most or many places in the U.S. to kill 130 people because someone would shoot them first whether they were police, soldiers or private citizens. This would be especially true in the South or West of the Mississippi River where gun ownership is more normal everywhere and people often have firearms in their cars or trucks all the time sometimes loaded for hunting or for shooting varmints or pests around a ranch or home.