The Israeli Iron Dome missile defense system is one of the most advanced and effective in the world. It's currently being put through its paces, with hundreds of rockets being fired from Gaza since the beginning of operation Pillar of Cloud. Already the system has intercepted more than 100 targets, and it will likely be going around the clock for some time. Fighters in Gaza make it difficult for Israel to destroy actual launchers by primarily using mobile truck firing platforms.
Here are a few of the best videos of the system in action since the beginning of the conflict. The first one becomes really intense around 40 seconds in.