Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.
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(CNN) – It is unclear whether the missing Malaysia airplane's Aircraft Communications Addressing and Reporting system, or ACARS, was shut off before or after the last verbal communication from the plane.
What difference does 'before' versus 'after' make to the investigation?
(CNN) – The big question: Will the sanctions President Barack Obama and the European Union announced Monday change what Russian President Vladimir Putin and the Russians do in Crimea and Ukraine?
"I hardly think that's a possibility," says CNN analyst and Russian journalist Vladimir Pozner. "Quite frankly, thus far at least, these are pinpricks."
(CNN) – With no physical evidence of Malaysia Airlines Flight 370 in the 11 days since its disappearance, investigators have been forced to rely on things like pings, signals and radar to figure out what could have happened to the plane and where it may have ended up.
But what's become evident in the midst of this mess is that the technology used to track the tens of thousands of planes that take to the sky everyday, can only reveal so much.
CNN's Tom Foreman walks through the different scenarios that may have played out.
(CNN) – There is another wrinkle which could change everything investigators thought they knew about missing Malaysia Airlines Flight 370's disappearance.
Malaysian officials attempted to clarify a key part of the timeline Sunday.