ABC News Live

A Vegas showgirl disappears just hours before the biggest break of her career, leaving behind a trail of mystery; a surveillance clip, hidden-camera footage and a 911 call pull back the curtain on her surprising personal life.

Using hidden cameras, host John Quiñones observes and comments on how ordinary people behave when they are confronted with dilemmas that require them either to take action or to walk by and mind their own business. Various scenarios are created that force people to make split-second -- and often surprising -- decisions, and variations of the situation (such as changing the genders, races or clothi

After a young mother is abducted from her home, it takes a series of chilling 911 calls -- including one from the victim herself -- to solve the case; the family speaks out in a new interview only with "20/20.".

Breaking news coverage and live video.

A weekly roundup of the best lifestyle content from "Good Morning America"; includes exclusive celebrity content, savings from "Deals & Steals," and interviews with authors behind some of the most anticipated books.

Breaking news coverage and live video.

Information and entertainment; discussing news and events.

Breaking news coverage and live video.

A weekly roundup of the best lifestyle content from "Good Morning America"; includes exclusive celebrity content, savings from "Deals & Steals," and interviews with authors behind some of the most anticipated books.

The stories from the GMA team - Robin Roberts, George Stephanopoulos and Michael Strahan.

Information and entertainment; discussing news and events.

Breaking news coverage and live video.

Breaking news coverage and live video.

Breaking news coverage and live video.

A weekly roundup of the best lifestyle content from "Good Morning America"; includes exclusive celebrity content, savings from "Deals & Steals," and interviews with authors behind some of the most anticipated books.

Breaking news coverage and live video.

Breaking news coverage and live video.

Anchor George Stephanopoulos and co-anchors Martha Raddatz and Jonathan Karl interview top newsmakers and officials, with reporting from across the country and roundtable debates over the hottest political issues.

Breaking news coverage and live video.

Breaking news coverage and live video.

Breaking news coverage and live video.

A Vegas showgirl disappears just hours before the biggest break of her career, leaving behind a trail of mystery; a surveillance clip, hidden-camera footage and a 911 call pull back the curtain on her surprising personal life.

A Vegas showgirl disappears just hours before the biggest break of her career, leaving behind a trail of mystery; a surveillance clip, hidden-camera footage and a 911 call pull back the curtain on her surprising personal life.

Delivering the news that matters most.

Delivering the news that matters most.

The beloved fitness personality's remarkable rise to fame; examining the cultural impact that made him a household name.

An 11-year-old is kidnapped while biking home, leaving his parents searching for answers; another previously abducted victim speaks out after helping solve the mysterious case.