#ThrowbackThursday -- Thunderbirds are go! During the height of its popularity in the 1960s, Thunderbirds was exported to more than 30 countries around the world. The show’s bombastic, infectious music was composed by Barry Gray -- the brass-driven "Thunderbirds March" -- is a testament to the power of great television themes. It perfectly encompasses the feel and tenor of the show, giving the program the big-sounding orchestral sound of a full-length feature film. And you can watch the series f