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In this Feb. 24, 2011 photo, Robert Diduca, 46, sits in Milford, Mass., District Court after his pretrial conference. A child pornography investigation, which began to unravel when Diduca sent a photo of a young Dutch boy to an undercover federal agent in Boston, led to the arrests of 43 men in seven countries and helped identify more than 140 child victims. (AP Photo/MetroWest Daily News, Ken McGagh)

Vast international child-porn network uncovered

The men came from different walks of life on two continents: a children's puppeteer in Florida, a hotel manager in Massachusetts, an emergency medical technician in Kansas, a day care worker in the Netherlands.

In all, 43 men have been arrested over the past two years in a

horrific, far-flung child porn network that unraveled like a sweater

with a single loose thread.