Prague’s annual festival of summer circus, Letní Letná, kicks off on the evening of August 14th with a dazzling highwire act: world-renowned tightrope walker Tatiana-Mosio Bongonga will cross a 350-meter tightrope 35 meters above the Vltava River. Ms. Bongonga is part of the French ensemble Cie Basinga. Bongonga’s “walk in the clouds” will stretch from the Faculty of Law, across the Vltava River to Letná Park, accompanied by live music.