Propulsion Systems Laboratory GalleryJohn Wargo, lead technician at NASA Glenn's Propulsion System Laboratory (PSL) is performing an inspection on the inlet ducting.Technicians and researchers pause during a jet engine test set up in the Propulsion Systems Laboratory.Jet engine test set up in the Propulsion Systems Laboratory.Technical staff sets up an F-405 engine in the Propulsion Systems Laboratory for testing.Operators monitor a test from the control room of the Propulsion Systems Laboratory.