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) – If there was an incident on missing Malaysia Airlines Flight 370 which led to an accident, sabotage, or an act of terrorism, the U.S. government "needs to know who, why, and how," says former U.S. Acting and Deputy Attorney General George Terwilliger.