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

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 ...

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

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 ...