There's an idea, just throw rocks at it until it goes away

Spain is proposing an interesting concept that could possibly provide Earth with some protection from those 'killer' rocks that's floating around up there (Bruce Willis ain't gonna live forever, ya know).

According to their plan, a pair of spacecraft will be launched together to intercept a selected asteroid. One will orbit the rock and take measurements and pictures, while the other slams into the asteroid in an attempt to alter its trajectory. The idea being if you do it far enough away, a smaller nudge is needed to make it miss Mother Earth.