Nevada National Guard soldier PFC Nikolas Herrera, left, inserts a swab into the mouth of Lt. Col. Eric Ballew during a walk-thru demonstration following the Clark County media briefing at the new UNLV Tropicana Avenue parking garage COVID-19 testing site that opens Wednesday on Tuesday, May 26, 2020 in Las Vegas. (L.E. Baskow/Las Vegas Review-Journal) @Left_Eye_Images