4 October 2012 - Kavarna, Bulgaria - When the gun sounds the start of the men’s race at the 20th IAAF World Half Marathon Championships on Saturday (6) morning here in this Black Sea coast resort town, the main focus of Kavarna 2012 will fall squarely on one man – Eritrea’s Zersenay Tadese, the event’s World record holder who’ll be chasing a fifth global title at the event.