Last year, a wayward satellite was destroyed before it's orbit could degrade, sending it plummeting through the Earth's atmosphere. Now, according to many this satellite was destroyed to ensure public safety, but more likely it was destroyed to keep any government secrets, or military hardware secrets, from falling into the "wrong" hands. Either way, they are good reasons. Check it out. It is quite spectacular.
Here is a video showing the launch of a SM-3 missile, sent on it's way from the USS lake Erie.