Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
A look at Obama's immigration plan. Plus, how long Takata knew of problems with its airbags.
(CNN) – As aircraft disaster investigations go, the downing of Malaysia Airlines Flighty 17 promises everything, but delivers almost nothing.
It has witnesses, debris fields, the so-called black boxes, and experienced accident investigators not far away in Kiev.
But this catastrophe has so far lacked immediate and complete access.
CNN's René Marsh reports.