Air Force Senior Airmen Duanna Challenger-Kuethe, a respiratory therapist with the California National Guard’s 144th Medical Detachment, checks in a first responder at a drive through COVID-19 vaccination site in Sacramento, California, Jan. 8, 2021. Many Cal Guard service members have been on COVID-19 missions since March 2020 when the pandemic began, but Jan. 7 marks the first day the Cal Guard helped administer vaccines to civilian first responders.

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Photo credit: © Operation 2021 / Alamy / Afripics
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