A few years back my brother-in-law Sam was starting a new job and was required to get a physical as part of the hiring process. A standard X-ray revealed a spot on his lungs and further testing confirmed it was cancer. The diagnosis came about two years after he’d quit smoking, but he had been a smoker for many years and was somewhere in his early 40s. Thankfully, because it was caught and treated so early, he is still with us today and doing great. But what if he hadn't had that physical? Earlier this week the U.S. Preventive Services...