If history is proven right again, will trader's and investors make the same mistake on the airline industry again. Almost every decade, the airline industry saids they have changed. All the analysts comes out and saids they have changed. This time is diffrent. They have learned from their mistakes. Even investors who previously said the airline industry would never be profitable comes out supporting airlines. But it just turned out they were in another boom bust cycle. Is this another case of boom and bust?