Mass shootings in US history

Two mass shootings in Texas and Ohio killed a total of 31 people. Take a look at some of the other worst mass shootings in U.S. history.

MGM Resorts denies liability for Las Vegas shooting

The owner of the Mandalay Bay hotel says it bears no liability in last year's Las Vegas concert massacre and is asking the courts to grant federal protections that shield companies who provide anti-terrorism products and services to civilians.