SANDRA SMITH (ANCHOR): Senator, if I could get you to respond to what we're watching in the lower part of our screen there. We're watching the Dow Jones Industrial Average, a snapshot of our markets. The S&P 500, the NASDAQ -- they are plunging this week responding to growing fears over the spread of this virus. Obviously, there's speculation it could get worse. Some say, like the president, it could miraculously disappear. Everyone is trying to assess the risk here at home and around the world. The Dow before today fell 10.5%. It's down another 4% this morning. How do we assess those risks?