After a disaster, investigators use data from the "black box" to piece together what might have led up to the incident. Sometimes the data's incomplete.

Experts have been studying a stopwatch for clues. Here's what's on it:

Split 1:

0:00'50"11

Split 2:

0:01'43"50
0:00'53"39

STOP:

0:01'57"57

Investigators are puzzled by the lack of data after the 1:57.57 mark.

They agree that something catastrophic must have occurred in the 0:14.07 following Split 2.

They're asking anyone with video evidence to come forward in hopes of finding the missing piece of the puzzle.