In this photo posted on Instagram, a man walks in Pyongyang, North Korea, under a new roadside banner referring to North Korea's controversial Feb. 12 nuclear test Monday, Feb. 25, 2013

 

              In this photo posted on Instagram, a man walks in Pyongyang, North Korea, under a new roadside banner referring to North Korea
In this photo posted on Instagram, a man walks in Pyongyang, North Korea, under a new roadside banner referring to North Korea's controversial Feb. 12 nuclear test Monday, Feb. 25, 2013. Tweeting and uploading to Instagram is pretty ordinary stuff in the world of social media, but revolutionary for North Korea. (AP Photo/Jean H. Lee)