The Tri Cities Regional Airport Will Conduct A Mock Airport Emergency Exercise On Tuesday. According To Airport Spokeswoman Melissa Thomas, The Drill Is A Federally-Mandated Exercise Designed To Promote Emergency Preparedness, Test The Airport’s Emergency Operation Plan, Train Personnel In Emergency Management Duties, And Coordinate The Efforts Of Local Emergency Service Agencies. She Explained That The Simulated Scenario Will Be A 50-Passenger Regional Air Jet En Route To The Airport That Crashes Upon Landing.