A stunning study recently published in the Journal of Environmental Medicine demonstrates that flight attendants "had a higher prevalence of every cancer we examined," particularly melanoma, breast cancer, and non‑melanoma skin cancer among women. Among the known carcinogens to which flight attendants are regularly exposed are poor cabin air quality, cosmic ionizing radiation, Circadian rhythm disruption due to nightshift work, irregular schedules and crossing time zones. Long-term flight attendants were also exposed to cigarette smoke before smoking was banned. Those of us who have witnessed the illnesses that plague this profession now have the scientific support needed to demonstrate the link between these terrible illnesses and their professions. Under the workers' compensation laws of many states, including Pennsylvania, flight attendants who can prove (1) they were exposed to a disease by virtue of their employment, (2) that there was a causal relationship between the disease and the employment, and (3) that the incidence of lung disease is substantially greater in their occupation than in the general population are entitled to a legal presumption that their condition is work-related.