FRONTLINE examines how Syrian president Assad is holding on to power.

Reporter Ghaith Abdul-Ahad journeys to the heart of the insurgency, with rebels that are waging a full-scale assault on the forces of President Bashar al-Assad in the streets of Syria's largest city. Within "liberated zones" near the city of Aleppo, the rebels not only fight the Syrian Army, but struggle against each other.

As fighting rages in the streets of Syria, FRONTLINE journeys to the heart of the insurgency, where rebel groups are waging a full-scale assault on the forces of President Bashar al Assad. Within "liberated zones", the rebels not only fight the Syrian Army, but struggle against each other in a bitter rivalry between secular and Islamist fighters.

FRONTLINE investigates the crash of Continental Flight 3407 and the rise regional and low-cost carriers. 8/21/2012

The Bristol Bay region of southwest Alaska is home to the last great wild Sockeye salmon fishery in the world. It’s also home to enormous mineral deposits estimated to be worth over $300 billion. In “Alaska Gold,” airing July 24, FRONTLINE probes the battle between those whose livelihood depends on the extraordinary fishing and foreign mining companies.

Explore the viability of hybrid cars and the prospects of effective innovation in public education. 12/4/2012

Nationwide, 7,000 students drop out every school day, but new evidence suggests that the make-or-break moment for high school dropouts may actually occur in middle school. FRONTLINE examines one Bronx school's unique approach.

Students and teachers from West Philadelphia High School, a public high school serving one of the most disadvantaged neighborhoods in Philadelphia, defy expectations as they design and build two super-hybrid cars for international competition and compete for the chance to be part of a technological revolution.

The fall 2011 video campaign was nominated for an Emmy in the Outstanding Promotional Announcement: Institutional category.

Trace the history of the AIDS epidemic through the experiences of individuals who tell their stories. 7/10/2012

Two Birmingham, Ala.pastors have very different approaches when it comes to addressing HIV. This clip is from FRONTLINE's "Endgame: AIDS in Black America," which airs Tues., July 10 on PBS.

The first reports of a mysterious new disease killing gay men never mentioned race.

To reduce the spread of HIV, Jeff McDowell runs the Atlanta Harm Reduction Coalition, which he says operates the only needle-exchange program in the state of Georgia, where the practice is still illegal, as in many places in the country. Here, he shows how the program works. [8/7/12 1:42:11 PM] Azmat Khan: you good with that?

In a groundbreaking two-hour documentary, airing July 10, FRONTLINE explores one of the country's most urgent, preventable health crises—uncovering the layered truth about how and why HIV is so much worse in black America and revealing how prejudice, silence and stigma have allowed the virus to spread deep into the black community.

Dental care can be a matter of life and death. Yet millions of Americans can't afford a visit to the dentist. Correspondent Miles O'Brien reveals the shocking consequences of a broken safety net in our dental system and the nascent proposals to fix them, including nonprofit dental centers, corporate dental chains, and financing treatment with a health care credit card.

Trinity's grandmother says that over two years she called 10 dentists for appointments, but because only 10 percent of Florida's dentists accept Medicaid, the five-year-old finally receives care for her infected teeth under general anesthesia at a hospital - at a cost of $18,000. Only 25 percent of Florida's Medicaid-eligible children get any kind of dental care.

FRONTLINE teams up with one of the leading thinkers of the digital age to explore life on the virtual frontier. 6/19/2012

Join correspondent Dave Iverson on his personal journey to understand Parkinson's disease. 6/12/2012

In "Al Qaeda in Yemen," award-winning reporter Ghaith Abdul-Ahad travels deep into Yemen's radical heartland to investigate how Al Qaeda and affiliated militants have seized control of parts of southern Yemen — and are winning some popular support.

The independent contractors who are building and servicing America's cellular infrastructure are 10 times more likely than an average construction worker to die on the job. In "Cell Tower Deaths" FRONTLINE and ProPublica investigate the hidden cost that comes with the demand for better and faster cell phone service.