Seoul - Lee Myung Bak on Tuesday became the first South Korean president in five years to preside over a national security meeting in the wake of a series of threats from North Korea.
The focus of the annual gathering - which brought together 200 military, intelligence, security and local government officials - is defending South Korea from "enemy infiltration and provocation of limited scale," the Defence Ministry said.
South Korea fears tensions with its Stalinist neighbour could escalate into a limited military altercation, possibly over the two countries' contested border in the Yellow Sea.