Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
What's the U.S. plan on Russia's "all out" invasion? Plus, a look at the strategy for fighting ISIS.
(CNN) – The Bluefin-21 is an unmanned vehicle that will eventually aid in the search for Malaysia Airlines Flight 370. It can go on a 24-hour mission underwater.
Bluefin Robotics manufactures the vehicle, and its president and CEO, David Kelly, explains what the Bluefin-21 does, and how it gets data.