This Saturday at the MGM Grand in Las Vegas, the UFC will put on their very first all-heavyweight main card with 'UFC 146: Dos Santos vs. Mir'. To promote the new main event, the UFC set up a Primetime special chronicling the two fighters' lead-up to the fight. You can check out episodes one and two of 'UFC Primetime: Dos Santos vs. Mir' inside.
Source: http://mmafrenzy.com/28627/ufc-primetime-dos-santos-vs-mir-episodes-1-and-2-video/
