The motive behind the deadliest mass shooting in modern U.S. history remained a mystery Monday as police sought to learn more about the apparent "lone wolf" gunman who opened fire on thousands of concertgoers from the 32nd floor of a Las Vegas hotel.At least 59 people were killed and hundreds more were injured in the shooting, which happened during a performance by country music star Jason Aldean Sunday night at the Route 91 Harvest Festival. The gunman hammered out a window at the Mandalay Bay Hotel and Casino and began firing with a cache of weapons. Authorities who stormed the suspect's room found that he had killed himself.Here are some things happening in response to the tragedy:THE INVESTIGATIONAuthorities are discounting the possibility...
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Las Vegas shooting: Everything you need to know