A startling portrait of everyday life in a war zone, through the eyes of children.

Three years into Syria's civil war, rebel forces aren't just fighting the Assad regime. They're also vying for control against factions aligned with Al Qaeda. FRONTLINE correspondent Muhammad Ali -- a Syrian native himself, delivers a gripping report from inside a country in turmoil.

Three years in to Syria’s civil war, rebel forces aren’t just fighting the Assad regime. They’re also vying for control against factions aligned with Al Qaeda. FRONTLINE correspondent Muhammad Ali—a Syrian native himself, and one of only a few reporters to make it safely into, and then out of, Syria’s northern front in recent months—delivers a gripping report from inside a country in turmoil.

In this undercover footage, North Korean soldiers are forced to build a railroad honoring Kim Jong-un — but privately question the new leader. This clip is an excerpt from FRONTLINE's “Secret State of North Korea,” which premieres Tuesday, January 14.

Just two years in the job and armed with nuclear weapons, North Korea’s Kim Jong-Un is the world’s youngest dictator, ruling one of the world’s most isolated countries with an iron fist. Drawing on undercover footage from inside the country and interviews with recent defectors, FRONTLINE shines light on the hidden world of the North Korean people.

A former classmate of Kim Jong-un recalls their days together at a Swiss public school. Speaking on the condition of anonymity, the classmate says that Kim Jong-un posed as the son of a diplomat, not the North Korean leader.

Kenji Fujimoto was hired by Kim Jong-il to prepare sushi for the North Korean leader and his entourage. He became close to the family, and soon was assigned to entertain the young Kim Jong-un, with Japanese toys and games of basketball.

Jeong Kwang-il, a former political prisoner in North Korea, now smuggles Western entertainment back into the country he fled.

Undercover footage smuggled out of the country shows North Korean women defying the rules and regulations of Kim Jong-un’s regime. This clip is an excerpt from FRONTLINE's “Secret State of North Korea,” which premieres Tuesday, January 14.

FRONTLINE correspondent Martin Smith goes inside the dramatic hunt that uncovered the biggest insider trading scandal in U.S. history, drawing on exclusively-obtained video of hedge fund titan Steven A. Cohen, incriminating FBI wiretaps, and interviews with both Wall Street and Justice Department insiders.

On the night she broke up with her police officer boyfriend, Michelle O’Connell was found dead from a gunshot in the mouth. Next to her was her boyfriend’s semi-automatic service pistol. The sheriff’s office ruled it suicide—but was it? FRONTLINE and The New York Times investigate what can go wrong when the police are faced with domestic violence allegations within their own ranks.

Review this investigative biography of Oswald, the man at the center of the Kennedy assassination.

One hospital developed a unique program to encourage proper hand-washing hygiene.

A deposition with Steven A. Cohen turns testy when the secretive billionaire is asked whether he takes seriously the issue of insider trading. Asked about his understanding of federal guidelines on trading nonpublic information, Cohen responds, "I rely on my counsel."

Under investigation for insider trading, hedge fund titan Steven A. Cohen tells an attorney in a never before seen deposition that, "The way I understand the rules, they're very vague."

Steven A. Cohen has been given a hypothetical: Would he be comfortable with his traders buying or selling a stock based on a tip from a reporter about an imminent negative news story. The hedge fund titan struggles to answer, saying, "It really comes down to where they heard that."

Hedge fund titan Steven A. Cohen spars with attorney Michael Bowe over whether traders at his firm, SAC Capital, must "strictly adhere" to the company's compliance manual.

Has the age of antibiotics come to an end? From a young girl thrust onto life support in Arizona to an uncontrollable outbreak at one of the nation’s most prestigious hospitals, FRONTLINE investigates the alarming rise of a deadly type of bacteria that our modern antibiotics can’t stop.

In this clip from FRONTLINE’s League of Denial, neuropathologist Dr. Ann McKee discusses the brain of Penn football player Owen Thomas, who took his own life at age 21. After Thomas’s death, McKee conducted research on his brain and was shocked to find Chronic Traumatic Encephalopathy in the young defensive end.

Pittsburgh Steelers center Mike Webster's favorite weapon was his head—and the hits kept on coming, for 17 years. In this excerpt from FRONTLINE's "League of Denial," Webster's peers describe what it was like to square off with "Iron Mike." Webster was diagnosed with chronic traumatic encephalopathy (CTE) after his death at age 50 in 2002.