Delta Airlines CEO Ed Bastian said that coming off a "tough" week for the airline, air travel should be "close to normal" by this weekend, should the government shutdown end today. Watch more: cnb.cx/47QyxZA | CNBC

Delta Air Lines CEO Ed Bastian backed the FAA's decision to mandate flight cuts during the government shutdown, saying there was "no question" that the conditions posed a safety risk. Bastian expressed frustration with the air travel industry suffering collateral damage during the shutdown, saying the company doesn't like "being a political football." He also urged officials to make sure air traffic controllers are paid the next time there’s a shutdown. Watch more: cnb.cx/47QyxZA | CNBC

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STARTING UP AN ACTUAL DC-9 APU (AUXILIARY POWER UNIT) In my last video, I talked about what an APU (Auxiliary Power Unit) is and showed you an actual APU of a classic McDonnell Douglas DC-9. This time, we sat in an actual DC-9 cockpit (non-flying but operational), and I am here to show you the step-by-step process of starting the APU of a DC-9. Of course, you cannot compare this to an Airbus A320, as the latter is more than a decade younger. Hence, you will notice the procedure to start a DC-9 h