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) – It has been nearly four weeks since Malaysia Airlines Flight 370 vanished with 239 people on board. Those in charge of the search effort have vowed to keep looking not just for months and years, but until "hell freezes over."
CNN's René Marsh has more.