Complex sentence: The NAA acknowledges the accomplishments and achievements in aviation and aerospace through its trophies and awards and are considered by many in the industry to be some of the most important awards of this nature in the world.
Split into simpler sentences: The NAA acknowledges the accomplishments and achievements in aviation and aerospace through its trophies and awards. Some of these trophies are considered to be some of the most important awards of this nature in the world.