There are few medical procedures feared more than a colonoscopy. But what if there was another way to screen patients for colon cancer that's much less intrusive? Now there is: The PillCam, an ingestible camera that takes high-speed photographs as it works its way through the digestive system and helps doctors spot polyps and other early signs of colon cancer was just cleared by the Food and Drug Administration. The device is designed for patients who have had trouble with the cringe-inducing colonoscopy procedure, which involves probing the large intestine with a tiny camera embedded in a four-foot long, flexible...