After his historic trip to China US President Barack Obama heads to South Korea, the final stop on his tour of the region.Some protesters will be determined to focus Obama’s attention on the controversial US led war in Afghanistan. However, discussions are more likely to focus on a stalled free trade deal between the two allies and the reclusive North’s disputed atomic ambitions. Lee Jung-Hoon, Dean of Underwood International College of South Korea’s Yonsei University said: “They are going to be speaking of the principles, the principles of North Korea returning to the six-party-talks, and that once they do return, once they get involved in the actual and genuine dismantlement negotiations, that things can progress on. Obama’s visit comes at a moment of high tension between the two Korea’s. The North has threatened to take unspecified military action to defend itself following a recent skirmish earlier this month between the two states naval ships.