Notes from AFNA 1. To change the attack point (ground-zero) - unselect "Lock Map" in the "Settings" tab, and then drag the map to bring the desired location to the map center. 2. Colour coding - click on the ground-zero marker in the center. 3. Specially constructed buildings may be very stable: in Hiroshima, one seismic-proof building survived 200 m only from the ground-zero, deep inside the "total destruction" zone.