From NASA:
Some international flights may expose you to cosmic radiation.
Which is kind of cool if you believe in the Fantastic Four. Not so cool if you're a frequent transatlantic flier.
Of course, they were looking at worst-case situation - a flight that was over the arctic circle (where protection is weakest) during a solar flare. But still... there is some long-term worry for flight crews.
Some international flights may expose you to cosmic radiation.
Which is kind of cool if you believe in the Fantastic Four. Not so cool if you're a frequent transatlantic flier.
Of course, they were looking at worst-case situation - a flight that was over the arctic circle (where protection is weakest) during a solar flare. But still... there is some long-term worry for flight crews.