A property owner says the slackline the helicopter is believed to have hit didn't have his permission to be there.

Federal aviation records show a notice was issued to pilots that a tightrope would be stretched across a mountainous area of ...

Investigators say a helicopter hit a highline stretched across Telegraph Canyon near Superior, killing four. Here’s what to ...

The crash occurred around 11 a.m. local time Friday and involved an MD 369FF helicopter, according to the Federal Aviation ...

Preliminary evidence indicated a slackline of more than 1 kilometer in length was strung recreationally across a canyon.

A private helicopter crashed Friday in a mountainous area of Arizona, killing all four people aboard, officials said. Those killed were the 59-year-old pilot, two 21-year-old women and a 22-year-old ...