We can actually deduce here that the author of "Code Talkers" supports the idea that the code talkers were essential to America's war effort by: highlighting the bravery of the soldiers the code talkers worked with.
<h3>What does it mean to support idea?</h3>
Supporting anidea actually refers to the way an idea is backed up or strengthened in order for it to be true and valid. Evidences can be given in order to support an idea.
We see that the author here actually supports the idea in the way he highlights the bravery of the soldiers.
I see engineers building with some kind of yellow roped around and i think that after the photograph was taken the building became a type of bridge or walking place due to the stairs i see at the bottom.