If you're wondering why there's a line of people waiting to get free water from a hand pump in an Illinois forest preserve, it's because of the benefits some people believe will come from drinking it.
If you use a sleep apnea mask or have a family member who does, there's an urgent message about a recall because of a device that's been connected to hundreds of deaths.
Before we get to the details that we know about his visit back to the Midwest, let's look back to when the Late Show with David Letterman visited Chicago.
Illinois has lost an hour of daylight each month since October, with the shortest days of the year coming this week. On December 21, the winter solstice brings only 9 hours, 7 minutes, and 44 seconds of daylight.