President Barack Obama poses for a selfie with Bill Nye, left, and Neil DeGrasse Tyson in the Blue Room prior to the White House Student Film Festival, Feb. 28, 2014.

Instagram: World Leaders on Display

Instagram is a visual communications app that encourages users to share and comment on photos and videos. The app is especially popular among world leaders, including U.S. President Barack Obama, Indian Prime Minister Narendra Modi, and Russian Prime Minister Dmitry Medvedev, who use the digital platform to share behind-the-scenes images, or snaps, of their personal lives. A recent digital diplomacy study found that more than 130 world leaders and heads of state now have Instagram accounts, underscoring the app's ability to connect foreign governments and citizens online.

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Photo by The White House / CC by-SA 2.0