Nearly 21 million adults and children are bought and sold worldwide into commercial sexual servitude, forced labor and bonded labor. The Heat examines why this is happening and what can be done?

It’s a growing international problem. Human sex trafficking in Southeast Asia and beyond has celebrities and heads of state taking notice. The numbers are staggering. According to the International Labor Organization, nearly 21 million adults and children are bought and sold worldwide into commercial sexual servitude, forced labor and bonded labor. Women and girls make up 98 percent of sex trafficking victims. About two million children are exploited each year in the global commercial sex trade.

The demand is driven by unscrupulous men and pedophiles who pay for commercial sex, ensuring that trafficking continues to exist. Traffickers, pimps and facilitators profit from this demand by supplying predominantly women and girls who are exploited on a daily basis.

Still, the question remains of how and why young girls are vulnerable to traffickers. This excerpt from a CNN documentary shows Don Brewster (Follow @DonJBrewster), a missionary working to help survivors of sex trafficking, and actor and activist Mira Sorvino (Follow @MiraSorvino), the United Nations Goodwill Ambassador to Combat Human Trafficking.

Joining the discussion is Andrea Matolcsi from Equality Now, a non-profit devoted to protecting women and girls’ human rights and Taina Bien-Aime (Follow @tainabienaime), the Executive Director of the Coalition against Trafficking in Women.

The Heat also spoke with a panel of experts to explore how someone can fall under the influence of a trafficker.

* Conchita Sarnoff, the Executive Director of the Alliance to Rescue Victims of Trafficking.

* Tina Frundt (Follow @tina4freedom), a survivor of sex-trafficking and founder of the non-profit Courtney’s House.

* Jane Wells, an award-winning documentary filmmaker.