 And that is that nagging question that just about everyone feels as they get closer to retirement, especially if you're turning 65, which is a big part of what we're talking about today. It's this constant wonder in the back of your mind of, do you really have enough saved? Will what you save, will that pile of money that you accumulated over all these years, will it last as long as you need it to? And did you know that you don't actually have to wonder about this?