The United States government made preparations for the possibility of war on the Korean peninsula amid North Korea's continued provocations.
Columnist David Ignatius wrote in the Washington Post on Sunday that the Obama administration's recent foreign policy moves included "contingency plans for North Korea."
Ignatius reported that just three weeks ago US President Barack Obama warned Chinese President Hu Jintao over the phone that North Korea is a "nuclear nation" whose recklessness threatens the US.
Meanwhile, White House spokesman, Robert Gibbs said on Sunday that major changes with Obama's cabinet are not likely but that it is very likely that President Obama will seek re-election in 2012.
Gibbs added that the job market has improved since President Obama took office which the American President wants to continue.