TODAY 8a: NBC News Exclusive — billionaire astronaut heading back to space. Team USA wins monobob gold and silver. Madison Chock and Evan Bates’ love story.

<p>Jared Isaacman, the billionaire commercial astronaut who helped raise more than 200 million dollars for St. Jude Children’s Hospital, is going back to space. Plus, we’re chatting with Team USA monobob gold and silver medal winners: Kallie Humphries and Elana Meyers Taylor, respectively. And in honor of Valentine’s Day, Jenna Bush Hager sits down with ice dancers Madison Chock and Evan Bates to chat about their chemistry on and off the ice and their beautiful love story.</p>