Add Yahoo as a preferred source to see more of our stories on Google. A slackline hung about 600 feet above the ground was likely the cause of a fatal helicopter crash in January. Four people were ...

A helicopter crash near Superior killed four people, including an experienced pilot and his three nieces, after allegedly striking a kilometer-long slackline. The FAA had issued a safety alert for the ...

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 ...

Federal aviation records show that a week before a fatal helicopter crash, a notice was issued that a tightrope would be stretched across a mountainous area of Arizona, providing a warning for pilots ...

A slackline hung about 600 feet above the ground was likely the cause of a fatal helicopter crash in January. Four people were killed in the Jan. 2 crash near Superior in Telegraph Canyon, about 65 ...

A helicopter pilot and three family members were killed after colliding with a slackline near Telegraph Canyon in Arizona.