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 ...
Jan. 28 (UPI) --A pair of German daredevils took a walk across a slackline suspended between two hot air balloons and earned a world record for their stroll at an altitude of 8,202 feet. Friedi Kühne ...
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