The company said the search for the source of contamination is focusing on the packaging and distribution process.
The search had initially focused on the sea, as much of the flight route was over the ocean.
The search, however, should not focus on geography, but on voice frequency and speaking speed.
The search for a cause has also focused on the environment.
That search initially focused on candidates outside the company.
If their luck held and the search didn't focus in this direction, they might make it yet.
The search is focusing on a virus, pollution or a biological toxin.
The search focused on any construction that involved work on the foundation of a building.
Tax workers said the last such search, early in this decade, focused on people of modest means, and they expect the same this time.
California led the search of sustainable alternatives with interest focused in methanol.