David Silcott, chief executive officer for S3I, places

David Silcott, chief executive officer for S3I, places fluorescent tracer particles into a nebulizer that is being aerosolized into the a KC-46 military transport aircraft, April 10, 2020, and traced using an Instantaneous biological analyzer and collector at the Nebraska National Guard air base in Lincoln, Nebraska. The U.S. Air Force’s Air Mobility Command, in coordination with the National Strategic Research Institute at the University of Nebraska and the Defense Advanced Research Projects Agency, conducted airflow tests on several different aircraft at the 155th Air Refueling Wing to assess measures to prevent aircrew and support personnel from contracting or transmitting the virus while transporting COVID-19 patients. (U.S. Air Force photo by Senior Master Sgt. Shannon Nielsen)