Cubans undertake a treacherous trek

Route to U.S. is via Panama-Colombia jungles

A Panama border police officer points as he begins to patrol in the Darien province, on the border with Colombia, in Yaviza, Panama. Panamanian authorities began noticing five years ago that the Darien Gap, the only interruption in the Pan-American Highway, was being used by migrant smugglers, usually to move people from Asia and Africa.  (AP Photo/Arnulfo Franco)

A Panama border police officer points as he begins to patrol in the Darien province, on the border with Colombia, in Yaviza, Panama. Panamanian authorities began noticing five years ago that the Darien Gap, the only interruption in the Pan-American Highway, was being used by migrant smugglers, usually to move people from Asia and Africa. (AP Photo/Arnulfo Franco)

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