A private helicopter crashed into a slackline in a mountainous region of southeast Arizona earlier this month, killing the ...

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

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