CNN's Stephanie Elam visits USC's Aviation Accident Lab for a look at how investigators learn to solve aviation mysteries.
Stephanie Elam demonstrates sonar technology and takes a look at the type of images being used in the Flight 370 search.
A bus carrying high school students crashed and burst into flames on a California highway. CNN's Stephanie Elam reports.
CNN's Stephanie Elam goes inside an airplane accident investigation lab where the wreckage says what really happened.
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