The things that stands out to me is that these guys, while not being scared ****less, were very aware that the end of their existence might be eminent and they went ahead and took care of business anyway. I know it happened before and, God bless our servicemen, it still happens today but the unity and focus on such a grand scale is awesome.
As far as the attitude of the U.S. today, I think maybe we view our society as an entitlement. I've heard it said by many WWII vets that they viewed life after the war as a gift, a chance to live life better, an opportunity to shape the world with noble goals in mind.
Speaking GENERALLY (don't be piling on.....I know there are a bunch of people are still fighting the good fight), maybe we are collectively spoiled and jaded. Maybe if more of us had hit the beach with an M1 rather than a six pack, we would we be more appreciative of what we have AND more confident in our collective ability to change the world for the better.
I also feel compelled to add that there is no doubt in my mind that if this country were confronted today with a black and white do or die situation such as the one that the Greatest Generation dealt with, we would collectively rise to the challenge. The moxie that is inherent to the USA may be somewhat dormant but it ain't anywhere close to being dead.