Vanguard (2006-2011) - Season 4 Episodes and Ratings

Correspondent Mariana van Zeller travels to Uganda, where many question whether the growing influence of American religious groups has led to a movement to make homosexuality a crime punishable by death. As an anti-gay movement spreads across the continent, gay Africans and their families face an increasingly uncertain future of isolation, imprisonment or even execution.

Vanguard correspondent Mariana van Zeller travels to South Dakota to examine the statistic that one in three Native American women will be raped in her lifetime.

Vanguard correspondent Adam Yamaguchi travels to India, Singapore and Indonesia to understand why people don't use toilets and what's being done to end the practice of open defecation.

Correspondent Mariana van Zeller explores the dark side to the sport's global popularity, what has been called "the new slave trade.

Correspondent Kaj Larsen investigates the alarming rise in the number of soldiers who have been traumatized by war and are now accused of bringing the violence home. Of the more than 2 million men and women who have served in the recent wars in Iraq and Afghanistan, as many as a third of them may now have post-traumatic stress disorder, or PTSD. A growing number of these vets are being charged with violent crimes, and Kaj travels to prisons and mental health facilities in Arizona, Colorado and Oregon to hear their stories.

Vanguard correspondent Christof Putzel traces the journey of a small town kid from Alabama to Somalia, where as part of Al-Shabaab he is now recruiting young Muslims from the west to wage jihad overseas.

Vanguard correspondent Christof Putzel travels to the U.S./Mexico border to investigate one of the most contentious issues in America today: immigration. Meeting with "coyotes," the hired smugglers who offer to take immigrants across the border for a fee, Putzel learns the methods used to evade border patrol and the dangers they face on the journey. Arrest and deportation are inherent risks, but the lack of water and scorching temperatures of the desert crossing are far more deadly. Those who do make it safely across the border face tightening immigration laws and an increasingly hostile public. Putzel ultimately crosses the border with a migrant and coyote.