From Fortune Magazine:
For the airlines of the nation are in trouble. Boom business has jammed air facilities from the reservation telephones on through the whole system and into the air. The major airports are getting close to the absolute maximum of traffic that can be handled safely. Whenever the weather gets bad, the specter of mid-air collisions above the inadequate airports haunts the entire industry. The coming winter is dreaded.
The only surprise here is that this was written in 1946 under the heading 'What's Wrong with the Airlines'
Scource: CNN Money