Schools throughout the country no longer use common sense. I suppose someone thought that his drawings were meant as a threat in some way. Schools have zero tolerance for anything that remotely lends itself to violence. When my nephew, who also plans on going into the military) was in first grade here in Northern Virginia, he took a G.I. Joe doll and accessories to school so he could play with them at his after-school daycare program. He made the mistake of getting them out of his backpack on the bus to show a friend. Remember, he was six years old. The principal told my sister and brother-in-law that they should feel lucky that he wasn't being expelled for bringing the G.I. Joe gun (1/2 inch plastic toy) because they have a zero tolerance policy on weapons. If I remember correctly, he was suspended for a couple days. I don't know anyone who's been killed with a G.I. Joe gun. I imagine the rules are even tougher since the Columbine murders and other school shootings. Good luck.