troops were across the border in seoul, and the united states and japan promising tough sanctions to chong yang for his tests last week. the fourth nuclear test required a tougher had international response from previous years, and she said that she expected china, which publicly opposed chong yang's program publicly at the u.n. >> i'm certain that china is very well aware that it's alcohol by necessary steps, we won't be able to stop nuclear tests, and we cannot guarantee the korean consistentilla. >> the president said that she was considering the need to deploy a u.s. anti-missile system on south korean soil, a move long opposed by china. >> when one country has it's own security, it must consider the security of other regions and stability. it's very sensitive. >> the nuclear test remains a triumph. state images showing kim jong il talking to his scientists. and for a fundamentally different response this time, that remains theey problem. being north korea has repeatedly said that it has pursued nuclear weapons as a national priority. >> just hours after delivering his finally state of the