An investigation is ongoing after an eyewitness saw the helicopter crash and fall.

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

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?

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

Add Yahoo as a preferred source to see more of our stories on Google. While an investigation is ongoing, it does appear that the slackline was marked with streamers (in circle) to make it visible to ...