Paramount's action sequel G.I. Joe 2: Retaliation is currently shooting in New Orleans, working towards a July 29, 2012 release date. Dwayne Johnson, who plays Roadblock, has been keeping his Twitter followers posted from the set, revealing in a new video that a "huge action scene" is being shot today. The actor also posted another video from two weeks back where he's checking his weapon before shooting. Click on the video players below for a glimpse at the G.I. Joe 2: Retaliation set.