Anti-North Korea activists burn placards featuring North Korean leader Kim Jong-Un, in support of US Ambassador to Seoul Mark Lippert, during a rally in Seoul on March 6, 2015. South Korea has reacted with shock and a little shame to a violent knife attack on Lippert that jarred harshly with the image of a largely safe, well-ordered society. AFP PHOTO / Ed Jones (Photo credit should read ED JONES/AFP/Getty Images)
