STEEL BOX. LIMITED EDITION. EN VIVO! Was recorded on April 10, 2011, in front of over 50, 000 ecstatic fans at the Estadio Nacional, Santiago, during the Round the World in 66 Days leg of the Final Frontier World Tour, and captures a magnificent performance by the band, ardently embraced by the legendary Latino passion and energy of their Chilean fans. This live show encapsulates to perfection the heart and soul of Iron Maiden 2011. The concert was filmed digitally using 22 HD cameras and an octocam (a flying camera which captures aerial crowd scenes), recorded in both stereo and 5. 1 audio and mixed by Maiden's longstanding producer, Kevin Caveman Shirley, all of which serves to accentuate the incredible atmosphere of this compelling performance.