Sorry...I have to agree with the first response.
Although, I can't agree with the statement that this was written on the level of a " Freshman in High School". Maybe in the H.S. Special Ed. program, as it is so simplistic that it is embarrassing to the author(s).
I would quickly delete it along with this Thread.
Seriously, from a person who has spent an equal amount of time, over 30 years, flying both passengers and freight this " article " is doing a disservice to the uninitiated.
Good Luck Though!
El Gato