以“生猛提问”打破知识门槛，聚焦现实生活的实地探访型知识探索综艺。
The fourth season of America's Got Talent, an American television reality show talent competition, premiered on the NBC network on June 23, 2009. Country singer Kevin Skinner was named the winner on September 16, 2009. This season is the first season to be broadcast in high definition.
