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Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.

Anchored by Jake Tapper, The Lead airs at 4 p.m. ET on CNN.

On the Next Episode of The Lead

Former CENTCOM commander Gen. Anthony Zinni on ISIS. Plus Robert Plant on his new album.

Former CENTCOM commander Gen. Anthony Zinni on ISIS. Plus Robert Plant on his new album.

March 17th, 2014
05:15 PM ET

Pings, signals, and radar: How could missing plane have evaded detection?

(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.

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