Tune in next Tuesday, August 6 at 9 p.m. to see Bay Area group Aerosphere Aerial Balloon Show perform live on America’s Got Talent. The act, which features Sarasota circus performers John and Alexandra Nock and their son Andrew, uses giant helium balloons to present aerial performance, the only act of its kind in the United States.

John, Alexandra, and Andrew are members of a world renowned family of circus artists specializing in stunt and thrill acts.  Aerosphere is a group act using giant helium balloons to present aerial performance, and the only act of its kind in the United States. The aerial balloon has been in the works for years, and John, Alexandra, and Andrew are the family that brings it to "America's Got Talent." Alexandra, an aerialist in the act, has been married to John for 17 years, and they have three children, Andrew, 16, Thomas, 11, and Patrick, 9, who are full-time students, but also participate in circus school during the summer. The kids travel with on work trips, and it has taken them all over the world. 

The act is inspired by John and Alexandra's respective grandparents, who originally hung a trapeze under a hot air balloon many years ago.  In fact, John's father was a part of Switzerland's first circus, and the family is part of one of the oldest documented families in circus history. John and Alexandra always believed this act is unique and angelic and creates the illusion of flight. They are very excited to have the opportunity to show America on the largest variety stage in the world.

Aerosphere will perform at New York City’s Radio City Music Hall as one of the third twelve acts of the top 60; only four acts from that night will advance to the next round. The grand prize winner will receive $1 million.

Fans can vote for their favorite act via toll-free phone, online at NBC.com, and via Facebook and Zeebox. The results of the third live vote will be broadcast on Wednesday, August 7 at 9 p.m.