There are stacks of letters in boxes in the hangar from kids in elementary schools, high schools, and churches back in the states. You pretty much just grab what you want, and answer them if you choose. I'd say that 99% of the letters and cards were supportive, but there were a few that were critical of the administration, of the soldiers, etc.
I specifically looked out for the ones that were negative and took my time to answer them. I always reminded the letter writer that American servicemen and women had died for freedom and for their right to disagree. I communicated a conservative Christian point of view in my answer and asked for God to bless America.