Once aviation became fundamental to life. People wanted to invest in making it better and safer for travel and government services. The made aviation exceed in quality and safety and also speed. It used to take weeks to fly across the country now it can take hours.
As with everything, interpretations depend upon the reader. An example can be the Quakers who were religious and fought for abolition of slavery claiming that the constitution stated itself that all people on Earth are equal since they were created by God, the creator. The founding fathers, however, believed that slaves cannot be people and that they are 3/5 of a regular human being, so equality does not apply to them.
Columbus failed to find new trades routes because his initial goal was to sail west and reach India. He obviously did not reach this goal because the Americas existed. When he ran into the Americas, he knew he was in new land and he chose to change his mission. He no longer looks for these trade routes and instead because conquering peoples in the Americas and building forts.
A veteran is wherer a soldier is killed or wounded and is unable to fight any longer. hope this helped