Megadeth, along with Metallica, Slayer, and Anthrax, collectively known as the "big four" of thrash metal, agreed to perform on the same bill during mid-2010. These performances were part of the Sonisphere Festival and were held in a number of European countries. One such performance in Sofia, Bulgaria, was filmed and released as a video album entitled "". These shows continued the following year in the United States. The first took place in Indio, California, and was the only scheduled show in the United States at the time, although a second American production was held at Yankee Stadium in New York City shortly afterwards.