Phase five is marked by human-to-human spread of the virus into at least two countries in the same area of the world.

VOA: special.2009.05.06

That set off a frenetic search through an area marked by dense brush and steep terrain.

CNN: See daring rescue of hiker

This area marked stiff resistance ahead of the stock's long descent toward the single-digit range, and could now provide a springboard of support for an extended rally.

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The high-resolution picture is of the Rio San Pablo, an ecological transition zone that's marked as a protected area by the National Environment Authority of Panama.

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