Video: The Rule of 80/20

Isolated Amazon Tribe Makes 1st Contact with Outside World

Video captures the first meeting between the indigenous tribe’s people and a settled community of villagers.

Americans Fighting Deadly Ebola Virus Coming Home to the US

Worldwide precautions being taken to prevent the spread of the deadly virus.

Health Officials Concerned Over Spread of Ebola Outbreak

U.S. aid groups now evacuating staff from Western Africa amid growing fears about the deadly virus.

Hammerhead Shark Gets Uncomfortably Close to Swimmers

Dan Flynn recorded video when a 10-foot hammerhead swam right at beach-goers, before turning back, in Florida.

YouTube Star Timothy DeLaGhetto Pays Off Parents' Home

Rapper, comedian also known as Traphik surprises his parents with a big check.

Video Shows Bill Clinton Talking Bin Laden Just Before 9/11

Ex-president says he "could have killed" al Qaeda leader.

Cease-Fire Between Israel and Hamas Crumbles After 2 Hours

Two Israeli soldiers and dozens of Palestinians reportedly killed as attacks resume.

Homeowner Tracks Down Alleged Package Thief From Home Security Video

Outraged homeowner tracked down the thief after posting security footage to Facebook.

Two American Health Workers Contract Ebola Virus

Dr. Kent Brantly and Nancy Writebol are now isolated and receiving treatment for this deadly outbreak.

Girl Accused in 'Slender Man' Stabbing to Appear in Court

Judge will decide if one of the two 12-year-old girls accused of stabbing their friend is fit to stand trial.

Inside an Airport Quarantine Station

ABC News' Dr. Richard Besser goes inside the CDC Quarantine Station at Newark Airport in New Jersey.

Ebola Outbreak Raises Concerns For Travelers

Those who traveled to Africa may have some reason to be concerned.

Survivor's Story: How I Lived Through Ebola

Tewa Tamba says she believed in her mind that she would survive.

Amazon Tribe Encounters Outside World

Tribe living deep in the rainforest lived removed from modern civilization.