The man in the middle is Col. Arnaud Beltrame, who offered himself to be swapped for a woman kept as a hostage by a terrorist last week. While in military school, he finished at the top of his class, which earned him the honor of holding the flag. He will not be forgotten.
My grandfather served in both World Wars. In WW1 he woke up wounded after a battle in a mass grave. Unfortunately people didn't recognize PTSD, and today we still don't understand it.