Prepare for North Korea aggression.

WASHINGTON (Reuters) – President Barack Obama has directed the U.S. military to coordinate with South Korea to "ensure readiness" and deter future aggression from North Korea, the White House said on Monday. The United States gave strong backing to plans by South Korean President Lee Myung-bak to punish North Korea for sinking one of its naval ships, White House spokesman Robert Gibbs said in a statement. The White House urged North Korea to apologize and change its behavior, he said. "We endorse President Lee's demand that North Korea immediately apologize and punish those responsible for the attack, and, most importantly, stop its belligerent and threatening behavior," Gibbs said.Link