Friedi Kuehne, Lukas Irmler complete slackline walk between 2 hot air balloons
(Newser) -
A pair of German slackliners have crushed a world record, walking between two hot air balloons 1.5 miles above the ground. The previous record height was 1,900 meters, or about 6,234 feet or just under 1.2 miles, per News.com.au . Performing separately on Saturday, Friedi...