Megadeth posted a video showing behind the scenes footage as the band shoots a new music video for “Public Enemy No. 1″ (see below). The song is the first single from the forthcoming LP “Th1rt3en,” due out on November 1, 2011. The video shows bassist Dave Ellefson and drummer Shawn Drover on set. “Public Enemy No. 1″ was released as a single on September 9, 2011.