Nevada January 31, 2024 8:38 pm Why is Las Vegas called ‘Sin City'? The city’s distinctive nickname has its origin in the early 1900s when illicit activities, including gambling and prostitution, became prevalent in Clarks County. US & World Videos 1:13 What is Indigenous Peoples' Day? 1:38 Meghan Markle makes surprise appearance at Children's Hospital LA gala 4:22 Hurricane Specialist John Morales becomes emotional over Milton's explosive growth into Cat. 5 1:10 American scientists win Nobel Prize for the discovering of microRNA 2:08 Hurricane Milton strengthens to Category 4 storm as it churns toward Florida