Be careful what you ask for.
Rest assured, you are doing you part, as much as the guys that are kicking in doors.
The fact that you are ready, willing and able to act as an instrument of America's defense means the nation will forever owe you a debt of gratitude.
I missed the first gulf war by 2 months, and I have always slightly regretted having lost the opportunity to hit some hard targets. However, my fate was to be a deterrent in the cold war, and to this day, I stand ready to "protect and defend the Constitution against all enemies......"
You are young enough that you will almost certainly have the opportunity to battle terrorists at some point.
Until then, enjoy life, and to learn all you can in preperation of that time.
At your age, 3 years feels like forever, in truth, it's a blink of an eye.