Preventing an Armageddon: Bong Wie at TEDxDesMoines 

Worst Aero instructor I ever had

Professor Wie, how are you ? It has been a long time since we studied together at Stanford. Please let Stanford-Korea know when you come to Korea.

Good presentation. The two stage nuke strike could also be aided with large railguns that the military is developing. Blow up the big rock with the bomb, then further break larger chunks with the railguns to smaller pieces that will sufficiently burn up in the atmosphere.

nice and clever!