International Sex Trafficking Trail Leads to the US - Slideshow

Phillip Martin, WGBH

Entering Pattaya, Thailand, a sexual playground for tourists

Phillip Martin, WGBH

The famous walking street in Pattaya where tourists worldwide solicit for sex.

Phillip Martin, WGBH

Some of the so-called sex workers are underaged and that by law is considered human trafficking.

Phillip Martin, WGBH

Palissorn Noja, who runs the anti-trafficking and child abuse center outside of Pattaya, discusses his center's role in the arrest of Gregory James Miller of Illinois.

The center has rescued hundreds of children, though adult customers also include Asians and men from the Middle East.

Phillip Martin, WGBH

Sex trafficking victims live on a couple of acres of land in a tiny sheltered community run by local volunteers

Phillip Martin, WGBH

There is tremendous poverty surrounding Pattaya and sex tourism is regarded as an alternative means of survival by many.

Phillip Martin, WGBH

Duean Wongsa, a lawyer for the anti-trafficking group TRAFCORD at the headquarters in Chiang Mai in northern Thailand.

Phillip Martin, WGBH

Ben Savasti, the executive director and founder of the anti-trafficking group TRAFCORD at the headquarters in Chiang Mai in northern Thailand.

Phillip Martin, WGBH

Chaing Mai's entertainment district is a magnet for sex tourism and human trafficking.

Phillip Martin, WGBH

Young "entertainment" workers in Chiang Mai. A great deal of prostitution in Thailand is voluntary and the result of limited options for eking out a living.