"Safest" here being the approach that physics and enfineering say is most likely to succeed: project risk, not actual safety risk. (Ironically it was so large

"Safest" here being the approach that physics and enfineering say is most likely to succeed: project risk, not actual safety risk. (Ironically it was so large that until it shaken up, the project nearly sank for the usual "megaproject drama" reasons)