When we have still fresh in the memory the asteroid that exploded a few weeks ago in the skies over Russia, another similar rock has just been detected in the vicinity of the Earth.
The fact that periodically there are more news about new space rocks walking near our planet, it does not mean that nowadays there are more of these objects than in the past, here the fact is that we have better technology to detect them.
There must be thousands of asteroids walking freely on space, counting all of them and knowing about their true destination, it would be a big step on the Universe knowledge. But still, although it can be incredible, we live in a kind of permanent lottery waiting for where they can fall and who can be damaged.
Now it would be question of creating some kind of weapon which could destroy the asteroids, because I think that the Earth can't defend itself against external threats.