Firefighters lower the American Flag to half-staff during the Nellis Fire and Emergency Services 9/11 Memorial Ceremony at Nellis Air Force Base on Friday, Sept. 10, 2021, in Las Vegas. First responders, Air Force members and other military members gathered to commemorate lives lost in the Sept. 11, 2001, attack, one day ahead of its 20th anniversary. (Ellen Schmidt/Las Vegas Review-Journal) @ellenschmidttt