Col. Matthew Jones, 436th Airlift Wing commander, tests a demo sample on a COVID-19 testing machine at the Baltimore/Washington International Thurgood Marshall Airport in Baltimore, Maryland, Jan. 15, 2021. Passengers must fill out a pre-travel questionnaire and complete an on-site temperature check prior to their flights. If testing is required, they will be sent to the in-house testing center where they will have a nasal swab sample collected and tested. (U.S. Air Force photo by Senior Airman Christopher Quail)