About 26,000 cellphones showed up on the Las Vegas Strip in a 4-day period in mid-July. You can see where else in the U.S. those same phones showed up in the same 4-day period. Las Vegas casinos are a likely hotbed for the spread of COVID-19. https://t.co/afKfLEIYwj pic.twitter.com/zFOo1lV83B— ProPublica (@propublica) August 27, 2020