Las Vegas shooter stockpiled weapons over decades, planned attack
New and terrifying details emerge about what led the Las Vegas shooter to carry out America's deadliest shooting to date.
LAS VEGAS, NV - OCTOBER 01: A man lays on top of a woman as others flee the Route 91 Harvest country music festival grounds after a active shooter was reported on October 1, 2017 in Las Vegas, Nevada.(photo credit: DAVID BECKER/GETTY IMAGES/AFP)
