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

Federal aviation records show a notice was issued to pilots that a tightrope would be stretched across a mountainous area of ...

A recreational tightrope strung across a remote Arizona canyon likely triggered a helicopter crash that killed four ...

Preliminary evidence indicated a slackline of more than 1 kilometer in length was strung recreationally across a canyon.

David McCarty, 59, was flying his relatives in his private helicopter through remote Telegraph Canyon near Superior, Ariz., ...

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

The crash resulted in the death of pilot David McCarty and his nieces Rachel McCarty, Faith McCarty and Katelyn Heideman ...

The line was more than 1 kilometer long, or more than half a mile, strung between mountains near Superior, Arizona, ...

Federal investigators recovered the helicopter near Superior and continued examining what led to the crash that left 4 family members dead.

Federal investigators are examining if a slackline was properly authorized following the deadly helicopter crash near ...

A half-mile-long slackline was hung across Telegraph Canyon, a recreational area located about 60 miles east of Phoenix in ...

A property owner says the slackline the helicopter is believed to have hit didn't have his permission to be there.