Conference like no other in history. Massive storm. The heaviest rain in years, set to drench california. This morning, fears of major loading in los angeles and san diego. And farther up the coast, the first big test of the repairs to that damaged dam. All systems go. Elon musks spacex team, preparing for a key launch. A mission after spectacular successes and failures that may be a huge step towards sending humans to mars. And marks manifesto. Facebook founder Mark Zuckerberg outlines running his company. Why it is fueling rumors that his eye is really set on running the country. Today, february 17th, 2017. From nbc news, this is today with van savannah guthrie. Live, from studio 1a, in rockefeller plaza. Hello, everyone. Welcome to today. Happy to have Hallie Jackson back in, while savannah is on maternity leave. Nothing to talk about. Ready to hop on a train back down to d. C. We have ooh la lot to talk a. A former navy officer has rejected the president s offer to be his National