Gunnar Nelson (13-1-1) was in Las Vegas to train with teammate Conor McGregor ahead of their much anticipated UFC 189 bouts. Gunni will face John Hathaway (17-2) during the International Fight Week as his will make his debut in North America.  Mjölnir teammate Jón Viðar put out a video as a glimpse into the 10 days of training and partying that took place a few months ago.