Nik Wallenda said Tuesday he will become the first person to walk a high wire directly over an active volcano. Wallenda, who has been nicknamed "King of the Wire," told Good Morning America he will walk over the Masaya Volcano in Nicaragua on March 4. The 1,800-foot long walk described as his highest ever attempted will air live as part of a two-hour "Volcano Live! with Nik Wallenda" special at ...