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) – With no sign of wreckage from Malaysia Airlines flight MH370, and the Australian Prime Minister telling the Wall Street Journal that this phase of the search may be over in a week, are investigators reaching the end of their leads?
CNN safety analyst and author of "Why Planes Crash" David Soucie, and CNN analyst and ocean search specialist Rob McCallum discuss.