Thousands see Chicago high-wire act
US tightrope walker Nik Wallenda has successfully completed back-to-back high-wire walks above the city of Chicago, watched by thousands of people. The 35-year-old achieved the two skyscraper crossings without a safety net or a harness. He first walked up a steep incline between buildings either side of the Chicago River. Then, blindfolded, he crossed between the two Marina City towers.