It's possible to read too much in photos from a summit that took place half a world away. President Enrique Pena Nieto attended a summit of Latin and European leaders over the weekend in Santiago, Chile. But I must say, I was struck with the body language seen in some of the photos. Pena Nieto seemed completely at ease with Cuban leader Raul Castro in the photo above. Someone seems to have told a good joke.

These photos are handouts from the Mexican presidency.

In contrast, both Pena Nieto and Argentine leader Cristina Fernandez de Kirchner seem very formal and slightly uncomfortable in the handout photo. It's not like they don't know each other. Pena Nieto visited Argentina last fall before taking office as part of a swing through South America. Language is not a barrier for the two.