On The DMZ, Matt and Bill try to figure out why Mitt Romney is taking a foreign trip. Matt reveals the one thing that could convince him to travel to the GOP convention in Tampa. They ponder whether "you didn't build that" will sink Obama, and why a rope-a-dope strategy won't work for Romney. They analyze why party conventions now happen so late in the summer, and who it helps. Plus: Has the culture changed so that it's now cool for teens to care?