Slacklines are a thin strip of nylon or polyester webbing stretched between two points, usually trees or rock formations, ...

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

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. A fatal helicopter crash southeast of Phoenix involved a slackline, also known as a highline, which investigators say the aircraft ...