Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
The trend of aviation troubles, with a plane missing in Africa today, and a crash in Taiwan yesterday.
(CNN) - Throughout this cold blast, CNN has been conducting a grand experiment on the effects of hypothermia on reporters. Two of our guinea pigs today - CNN's Erin McPike in Minneapolis, where temps have hovered around zero all day, and CNN's Ted Rowlands in Chicago, where it's even too cold for polar bears at the zoo.