It's been a while since John O'Callaghan tightened things up with his Joint Operations Centre alias. Ever sharp-edged, John delivered the 100th Captivating release with his 'Backup' and 'Cramped' at the end of 2009. Within the past 12 months, a lot has happened. John kicked off his very own Subculture label, now home to all of his productions and part of the Armada Music family. After 2 successful compilations, securing an amazing 33rd position in the DJ Mag and being Ireland's number one DJ an