Obama's visit to South Korea is aimed to pressure North Korea before international nuclear talks.
According to the Washington Post, Obama sternly expressed his thoughts on North Korea's nuclear programs while also encouraging the international community also put pressure on Pyongyang. "North Korea needs to understand that bad behavior will not be rewarded," Obama said during an evening news conference with South Korean President Lee Myung-bak.
The summit meeting on nuclear security will be attended by top officials from 54 countries including China and Russia, according to CNN. However, the subject of the meeting has been overshadowed by North Korea's plans of a long-range missile test.
According to the Washington Post, the missile test will jeopardize the aid North Korea will be able to receive from the United States.