. >>> tonight, south korea's president says north korea will face consequences for future agression. south koreans took shelter after shelling could be heard on yeonpyeong island. this comes after north korea launched artillery fire. well, today, south korea's president says he feels deponently responsible for failing to protect people from that attacks. some hope for a peaceful resolution. >> i think it's time we talk about regime change in north korea. i do believe this is a very unstable regime. >>> today, china proposed an emergency meeting for next month to talk about this developing crisis. >>> quiet, soft spoken, hard- working, that's how he was described. he allegedly planned to blow up a van full of explosives. the fbi had worked with the suspect for months and arrested him as he tried to death neat a fake bomb. >> he lived an average student life. he would do his parties rand hang out with his frat brothers. >> but he had not been attending class since last month. documents show he allegedly cold undercover agents the courthouse square was the perfect place to attack becaus