How was a thin strip of nylon or polyester webbing stretched between two points to blame in the January crash that killed four near Superior?

The helicopter crashed after it struck a recreational slackline suspended in Telegraph Canyon on Jan. 2, killing all four ...

A preliminary report reveals the helicopter hit a slackline, a type of webbing, that was stretched across Telegraph Canyon.

Shortly after the crash, another helicopter flew near the slackline, the National Transportation Safety Board investigation ...

The people who strung the line - which is used in a sport akin to tightrope walking - had filed an aviation safety notice, raising questions about the air alert system.

Federal investigators are examining if a slackline was properly authorized following the deadly helicopter crash near Superior that claimed the lives of four people on Friday, ...

The NTSB released on Wednesday its preliminary report into the helicopter’s collision with a slackline, including new ...

The National Transportation Safety Board released its preliminary report on the Jan. 2 Superior crash that killed four family members on the pilot's wedding day.

Investigators say a helicopter hit a highline stretched across Telegraph Canyon near Superior, killing four. Here’s what to know.

This article originally published at Helicopter crashes into kilometer-long slackline in Arizona, killing four.

A fatal Arizona helicopter crash involving a high-altitude slackline has renewed scrutiny of the FAA’s NOTAM system ahead of its planned upgrade.

Four Oregonians who were killed when a helicopter crashed near Superior, Arizona on Jan. 2 were members of the same extended family, relatives said.