@CNN: Along with regular de-icing of planes before take-off, airlines put their aircraft through rigorous testing in some of the coldest places on the planet before they are ever pressed into service https://t.co/osD2dYkpSK

@CNN: Along with regular de-icing of planes before take-off, airlines put their aircraft through rigorous testing in some of the coldest places on the planet before they are ever pressed into service https://t.co/osD2dYkpSK