Dan Rini, the Rini Technologies president, presents a proposal for a personal cooling system to 6th Air Refueling Wing leadership, during MacDill Pitch Day Jan. 22, 2020, in Tampa, Fla. MacDill Pitch Day provides an opportunity for MacDill Air Force Base to partner with small businesses to find solutions to challenges on base. (U.S Air Force photo by Airman 1st Class Shannon Bowman)