About the radiation - pretty anecdotal, but Arthur “Art” Astrin (rip http://ewh.ieee.org/r6/scv/its/MtgSum/Astrin.html) was responsible for Wireless part of Apple revival product range ~1999 https://www.youtube.com/watch?v=Tj5NNxVwNwQ He spend couple of years flying weekly SF-Shenezhen. Ended up with severe metastatic melanoma. "Incidence of cancer among licenced commercial pilots flying North Atlantic routes" put 10% higher rick of malignant melanoma on frequent flyers.