It’s Wednesday, December 5th. Here’s today’s round-up of news and tips from Consumer Reports—the independent, non-profit organization people trust for ratings, reviews, and news. On CR.org today: Questions you should ask before you get a medical screening, how to stay safe from online threats while holiday shopping, and our favorite gift ideas for the gadget geeks in your life. We also have details on deep discounts for shoppers during the entire month of December.