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 3:22 Pleasant Sunday before possible Monday rain 1:43 Hotel workers' strike underway in Boston 2:38 Former Pres. Trump, supporters return to Butler, Pa. for rally 2:47 Boston hotel workers say they want to be able to afford to live in the city 1:38 Former Pres. Trump returns to site of assassination attempt to rally supporters