America's Got Talent: Extreme: Alfredo Silva's Cage Riders wins first season and $500,000 prize

America's Got Talent: Extreme: Travis Pastrana hits Golden Buzzer for sway pole artist Cyndel Flores

America's Got Talent: Extreme: Terry Crews slams Golden Buzzer for Alfredo Silva's Cage Riders group

Simon Cowell pays tribute to 'extraordinary' America’s Got Talent star Nightbirde