article_snippet: Speculation comes in the wake of any tragedy such as this, but experts say certain facts can be significant for those who want to know what happened.
article_snippet: Real-time flight data available to the public tells a key part of the story.
article_snippet: Sources: CNN and flightaware.com .
article_snippet: The data on air traffic accidents are clear: A majority of accidents happen upon takeoff or landing.
article_snippet: According to the Federal Aviation Administration, even though 83% of a plane's flight time is taken up with the climb, cruise and descent phases, less than 16% of accidents happen during this period.
article_snippet: Soucie described the timing of the crash as an "anomalous thing that happened.
article_snippet: It is "incredibly rare to happen in the middle of the flight," Soucie said, meaning the pilot would have to act fast.
article_snippet: Does it hint to an incursion in the cockpit or a pilot's motives?
article_snippet: I don't think you'd rule anything out at this point," CNN aviation analyst Miles O'Brien said.
article_snippet: It's not like it appears as if it was an in-flight breakup.
article_snippet: So what was going on in the cockpit is what we're going to be talking about in the coming days.
article_snippet: " CNN aviation analyst Miles O'Brien pointed out the known details of the crash -- a rapid descent, no radio call and a flight that continues into the mountains -- are not part of a "typical emergency scenario.
highlights_snippet: CNN aviation analyst says this is not a typical emergency incident, but all possibilities are part of probe .
  
highlights_snippet: There are early clues, however, that will be key to investigators .