Asteroids

It has been mentioned elsewhere on the forum, the fact that we are due for an Asteroid strike. Assuming that we do, at sometime in the near future, do our World leaders have any contihgency plans to put into place to deal with such a threat.
I am presuming that if we have the solution, it is viable, however, IF the Asteroid is so large than it can’t be destroyed prior to it hitting Earth, what would you do, considering that it would be , say in 6 months time?.

Lincoln. 7