Re: In addition...
The most dangerous rocks are those located near the ecliptic plan as they more frequently cross Earth's orbit than others. This means the ISS orbit isn't exactly the most suited for your kind of mission.
Besides, there are other means to deflect a rock's path.
Nuclear weapons in space? Launching those nuclear weapons from Earth?
Very unlikely...Es ist verboten!
That asteroid 2002NT7 has a very inclined orbit relative to the Earth's.
The slightest error in calculation will send the crossing point very far away from our planet.
(I think you've seen "Meteor" not too long ago)
Raoul