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The NTSB continues to investigate Tuesday's engine explosion on a Southwest flight. Rob Mark, former supervisor at the FAA, discusses of accidents like this and what investigators are looking for.

For the first time in almost six decades, the nation of Cuba will no longer have a Castro as president. FOX's Steve Harrigan has more from Havana.

Plus, commentary by former Deputy Assistant Secretary of the U.S. Army Van Hipp.

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