David McCarty, 59, was flying his relatives in his private helicopter through remote Telegraph Canyon near Superior, Ariz., around 11 a.m. Friday when the aircraft struck a recreational highline

A Phoenix hiking store owner explains who would install a slackline across a canyon and the standards they would have to meet. The in-depth look into the criteria comes days after investigators said a helicopter hit a recreational slackline south of Superior on Friday,

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,