As I understand it, duck and cover was to protect you from flying debris driven by the shock wave. If you were out of the blast zone and survived the damage from the shock wave, you had a chance of survival.
November 20, 2013
As I understand it, duck and cover was to protect you from flying debris driven by the shock wave. If you were out of the blast zone and survived the damage from the shock wave, you had a chance of survival.