ISIS Hostage Family Says Obama Broke Promise for Charity Donation
Parents of Kayla Mueller say president offered contribution but never delivered.
Kayla Mueller Defended Christian Faith to ISIS Executioner 'Jihadi John'
Fellow hostages described the Arizona native's strength, selflessness.
ISIS Hostage Kayla Mueller's Heartbreaking Proof of Life Video
"It's very terrifying here," American ISIS hostage says in the video.
Doctors Without Borders Refused to Help American ISIS Hostage Kayla Mueller
Arizona woman dedicated her life to helping others around the world.
Who Was Kayla Mueller, American ISIS Hostage?
Arizona woman had dedicated her life to helping others around the world.
TIMELINE: Kayla Mueller in ISIS Captivity
Arizona woman traveled halfway around the world to help refugees.
Doctors Without Borders Statement on ABC News '20/20' Kayla Mueller Report
Doctors Without Borders statement on ABC News '20/20' Kayla Mueller report.
When 'View' Co-Hosts' Personal Lives Became 'Hot Topics'
Current and former “View” co-hosts shared memories from their time on "The View"
'The View' Co-Hosts Recall the Show's Fiery, Walk-Off Moments
One of the most heated moments came in a debate over the Iraq War.
Louisiana Man Found Guilty of Murder in Wife’s 1962 Death
Felix Vail, now 76, was accused of killing his wife Mary Vail on Oct. 28, 1962.
When 3 Women Disappear, Suspicion Falls on the Same Man They All Loved
Felix Vail was the last person to see Mary Vail, Annette Vail and Susan Hensley.
Inside Texas Doctor’s Plot to Kill Rival Doctor in Love Triangle
Dr. Joseph Sonnier was found shot and stabbed to death in his own home.
What Happened in Texas Doctor Love Triangle Murder-For-Hire Case
One doctor ordered the killing of another doctor for dating his ex-girlfriend.
Daughters of Texas Murder-for-Hire Killer Discuss Dad's Involvement
Prosecutors claimed a Texas doctor hired David Shepard to kill another doctor.
How This Family of Thieves Who Tried to Hide Almost $4M Were Caught
Archie Cabello, his wife and son alluded authorities for a more than a decade.
Meet the Family Who Stole Millions, Evaded Police for Over a Decade
The Cabello family stole nearly $4 million and almost got away with it.
'It's Not Us Versus Them,' Obama Says in Town Hall
President participated in a Disney Media Networks town hall on race and policing
After Town Hall on Race, Reminders of Love and Peace
The police officer behind a viral video and widow of a slain preacher attended.
The Mysterious Death of Annie McCann
The teen's parents have been fighting for years to prove she was murdered.
Elizabeth Vargas
Vargas Is the Co-anchor of '20/20' on ABC News
David Muir
Weekend Anchor, "World News with David Muir" Co-Anchor, "20/20"
Part 1: The Video That Changed Everything
Carl and Marsha Mueller's quiet life in Arizona is shattered when their daughter is kidnapped by terrorists.
Kayla Mueller Part 2: Former ISIS Hostages Speak Out
Those held with Kayla describe her caring, courage while in ISIS captivity.
Part 3: They Left Our Daughter 'To Be Tortured and Raped'
Kayla's parents learn humanitarian organization had contact information for captors for weeks.
Part 4: Ransom Deadline Approaches
Muellers make video plea directly to ISIS leader Abu Bakr al-Baghdadi.
Part 5: Kayla's Sacrifice Allows Sex Slave to Escape
Even after being raped by ISIS leader, Kayla foregoes her chance to run to save others.
Part 6: ISIS Says Kayla Is Killed in Bombing
Muellers say President Obama gave sincere apology, said he'd donate to foundation for Kayla.
20/20 06/12/16: Nightclub Massacre: Terror in Orlando
Orlando Nightclub Massacre: A Timeline of What Happened; Orlando Nightclub Massacre: A Violent Attack on Prideful Community;...
20/20 06/07/16: Bobby Brown: Every Little Step Special Edition
Bobby Brown on Forming New Edition, Then Solo Career; What Led to Bobby Brown, Whitney Houston's Divorce; Bobby Brown on...
20/20 04/29/16: A Father's Story
Scientology Leader David Miscavige's Father on Son's Childhood; Ron Miscavige Says Son Changed After Joining Scientology.
'The View': 20 Years in the Making
Look back at 'The View' through the years as the show launches its 20th season.