Nik Wallenda practices for his upcoming wire walk over the horseshoe falls, at the Seneca Niagara Casino parking lot in Niagara Falls, New York May 22, 2012. Despite Wallenda's protest, it was announced yesterday that he will wear a tether for the June 15 walk, amid concerns from the ABC television network, who will air the event live, as well as other sponsors.[Photo/Agencies]