South Korea: Blaming Pyongyang for the ChonAn Sinking

South Korea plans to announce on May 20 the outcome of its investigation into the March 26 sinking of the navy corvette ChonAn, and all indications suggest Seoul will formally blame a North Korean torpedo. While South Korea's options to respond are limited, the government has begun a diplomatic offensive to garner support for stricter United Nations-backed sanctions on North Korea, and is considering cutting economic ties with the North aside from humanitarian aid and the Kaesong joint economic zone. But perhaps more significant are the changes in Seoul's defense programs that may emerge from the review of the attack and investigation.