An in-depth look at the tragic and gruesome fraternity death of 19-year-old Penn State University student Tim Piazza; his murder leads to one of the largest criminal indictments in history against a fraternity and its members.

All the best and worst moments from the year 2018.

All the best moments and all the worst moments from the year 2017.

Randi Kaye looks at the history of the storied White House Briefing Room; he discusses the impact it has on coverage of the Trump administration as well as what it could mean for media coverage of future U.S. presidents.

A look back at the crimes of John Wayne Gacy, one of America's most notorious serial killers, and the cold case investigation opened 30 years after his conviction to identify eight of his victims.

Examining the history of impeachment, originally meant to be a last-resort measure, and how it has become a political weapon during the last few decades.

A collection of compelling, independent stories that go behind-the-scenes of some of the world's most popular online videos; a discussion with the people who were involved and see how their lives were changed forever.

Examining what potential Supreme Court decisions regarding voter rights could mean for upcoming midterm elections and 2020.

James Duncan maintains his innocence even after a judge sentences him to 70 years in prison for abusing his newborn son, Kody; the emotional journey of James Duncan and his son Kody, now in his 20s and fighting for his father's release.

Two months before her 20th birthday, Jessica Chambers is left for dead on the side of the road.

An in-depth look at conditions in Puerto Rico one year after it was pummeled by Hurricane Maria, including the ongoing human toll, the continuing challenges to rebuild communities, and the successes and failures of government agencies.

Jake Tapper speaks with George Papadopoulos about his role in the Trump campaign, the Mueller investigation, and Papadopoulos' guilty plea.

John McCain's life and legacy are remembered; Dana Bash anchors.

Fareed Zakaria searches to find the true nature of the relationship between President Donald Trump and Vladimir Putin, and the implications of their relationship for the world.

Donald Trump is taking over TV. Not just the daily news cycle, but prime time, scripted television. CNN examines the impact of Trump on TV, and the blurred lines between entertainment and reality.

Ten years after the shocking death of 2-year-old Caylee Anthony captures the attention of the nation, journalist Randi Kaye travels back to Orlando, Fla., to speak with the key figures who took part in the subsequent investigation and trial.

Fareed Zakaria addresses what he sees as the real reasons for North Korean leader Kim Jong Un's sudden transformation; stories of Kim Jong Un's father and grandfather; how the fearsome North Korean propaganda machine was developed.

North Korea has shown the world its missiles and military might; the rest of the country remains veiled in secrecy; exclusive and unprecedented access; Will Ripley returns to North Korea for a record twelfth trip.

The story of how Aimen Dean, a bookish kid from Saudi Arabia, met Osama bin Laden and became a valued al Qaeda operative; he eventually switched sides and became a valuable Western spy and double agent inside al Qaeda.

Alisyn Camerota looks back at Harry and Meghan's lives, their romance, and how they will change the monarchy forever.

Twenty years ago, Princess Diana was killed in a tragic accident in Paris; it is a story told by those closest to her; revealing intimate details of the last days of Diana's life, as well as the moments that made the princess.