It is actually even more closely related to nuclear weapons that the timing tells, one of the main proponents of the impact theory was Luis Alvarez, a physicist

It is actually even more closely related to nuclear weapons that the timing tells, one of the main proponents of the impact theory was Luis Alvarez, a physicist who had significant influence on the ignition system of the plutonium bomb dropped on Nagasaki (http://en.wikipedia.org/wiki/Exploding-bridgewire_detonator#History http://en.wikipedia.org/wiki/Exploding-bridgewire_detonator#...). (The other one was the geologist Walter Alvarez, his son.)