 Complete the following phrase:  In an August 2012 Singapore performance on the tour to support the bands then-new album Thirteen, Mustaine expressed his views of President Obama and recent gun violence in the United States, making an accusation that Obama had staged the shootings at Aurora, Colorado and a Wisconsin Sikh temple in order to push a gun control agenda, while engaging the audience during onstage banter in between songs. Mustaine also criticized the 