Is it harder to learn how to drive a semi tractor trailer, train or aircraft?

or:Is it harder to learn how to drive a semi tractor trailer, train or aircraft?or:i think it takes some specialized training in order to drive any o

or:Is it harder to learn how to drive a semi tractor trailer, train or aircraft?

or:i think it takes some specialized training in order to drive any of those train trailer or aircraft and i think it cost for the lesson and training sometimes you can get help with the fiancial end of those for the schooling but being specialized i think the trainers really are skilled in teaching and hands on training which you know you have the tests and things to

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