From time to time, everyone is forced to experience the ritual of the apartment tour. As your friend or relative leads you through their home for the first time, politeness dictates that you pretend to be impressed by the things you’re being shown, however unexciting they are, whether it’s a bathroom sink or an allegedly fantastic view of the building across the street. Well, President Obama does that all the time, except instead of apartments, he’s being led through factories, laboratories, and workshops. It’s one of Obama’s official duties as president according to Article II, Section II of the Constitution (just take our word for it), and it also happens to provide him with great photo-op possibilities — but only if he’s focused enough to make himself look interested in the mundane things he is being shown. Sometimes, he's more successful than others.