It was a terrorist attack!
I love CNN, they are going to mangle terminology to get the most sensational news out.
This was an act of war. We are at war. Those troops are in a state of war. Enemy combatants infiltrated the camp and tried to kill some members of the 101st.
Of course these are the same networks that try to differentiate that those who die in helicopter accidents the past few days didn't actually die during the war, thereby causing the families more grief.
Actually, I wouldn't be surprised if the military tries to play this up as a "terrorist" attack rather than a "our guards didn't do their jobs" or a "our security/screeners weren't good enough and we let just anybody into the camp".