The last major asteroid impact led to the extinction of Dinosaurs, we won't let the next one do that to us! NEOShield-2 is funded by Horizon 2020, which is the biggest EU Research & Innovation programme ever with nearly $80 Billion of funding.
The principal is that for small objects civil defence (evacuating specific areas) will be sufficient, but for large objects or a short warning time, a blast deflection of some kind will be required. In between, a kinetic impactor that imparts momentum onto the NEO could be employed, or a gravity tractor that pulls the NEO over a long period could be used if there is enough warning time.
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