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) – As the days stretch on, it's impossible to ignore the parallels between the disappearance of Malaysia Airlines Flight 370 and some of the most nagging mysteries in the history of aviation, many of which remain unsolved.
CNN's Jake Tapper reports.