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.

Ammo seller to Las Vegas killer arrested on federal charge

Douglas Haig, an Arizona man who says he sold tracer ammunition to the gunman in October's Las Vegas massacre, was arrested Friday on a charge of conspiring to manufacture and sell another type of ammunition -- armor-piercing bullets -- in violation of federal law.

Las Vegas shooting: Unsealed documents reveal new details

Hundreds of pages of court documents unsealed Friday in the case of Las Vegas gunman Stephen Paddock offer a blueprint of investigators' pursuits in determining how and why the reclusive high-stakes gambler carried out the deadliest shooting in modern U.S. history.

Timeline: Terror in Las Vegas

Thousands of country music fans became witnesses or victims of the deadliest mass shooting in modern US history when a gunman unleashed "hundreds" of bullets into the Las Vegas Strip crowd. Here are the latest developments.