Forget worrying about what you've packed in that suitcase you have to shell out a few extra bucks for; if you've packed on too many pounds and want to fly on United, you could be headed for shelling out a second seat's worth. The airline is now enforcing a policy that stipulates that "passengers who are unable to fit into a single seat; are unable to properly fasten their safety belt [using a single seatbelt extender; and/or] are unable to put the seat's armrests down, will be denied boarding unless they purchase an extra seat," according to cbs2. more ›