Page "Asteroid impact avoidance" Paragraph 56

According to Rusty Schweickart, the gravitational tractor method is also controversial because during the process of changing an asteroid's trajectory the point on Earth where it could most likely hit would be slowly shifted across different countries.

It means that the threat for the entire planet would be minimized at the cost of some specific states ' security.

In Schweickart's opinion, choosing the way the asteroid should be " dragged " would be a tough diplomatic decision.