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Welcome to the NESC's Propulsion training video catalog. NASA utilizes a broad range of propulsion system types, most common being solid and liquid chemical propulsion and electric propulsion. NASA also does research into airbreathing and advanced (non-chemical) propulson. This catalog contains training videos developed by NASA's Propulsion Technical Discipline Team (TDT). These training modules provide lessons learned and perspectives in propulsion engineering. We will continue to add to this content and welcome your suggestions for additions (email email@example.com).