The next time you fly, you could be asked to step on a scale before boarding the plane. Airlines need to calculate an aircraft’s weight and balance when boarding passengers. Unfortunately, the data that's been used by airlines to guess the total weight of the passengers is outdated. In other words, Americans have gotten fatter and the FAA doesn't know exactly how much we've plumped up. Therefore, passengers may soon be asked to check their weight before boarding a plane so that the FAA can collect new data. It's all in the interest of safety. (Fox News)