Someone tweeted a photo of Yoon Doo Joon on the set of IRIS 2 with two unidentified men. Yoon Doo Joon is looking good as he works on staying fit for the action-packed IRIS 2.  Looks like he is a black belt so he must have some killer moves lined up for us as we anxiously wait for IRIS 2. Now that 2013 is finally here, we can't wait! How about you?