US President Barack Obama has met with his South Korean counterpart Lee Myung-bak in Washington. Topping their talks were security and the economy. Zeng Siwei finds out what the two sides agreed on.

The US and South Korean leaders discussed the situation on the Korean peninsular.

President Obama said the nuclear and missile programs of the Democratic People's Republic of Korea pose a grave threat to the the peace and security of Asia and the world.

Barack Obama, US President, said, "We've reaffirmed the endurance of our alliance and America's commitment to the defense of the Republic of Korea."

Obama urged a vigorous pursuit of the denuclearization of the Korean Peninsular. Lee Myung-bak agreed.

Lee Myung-bak, South Korean President, said, "We've agreed that under no circumstance are we going to allow the DPRK to possess nuclear weapons. We agreed to robustly implement UN Security Council Resolution 1874."

Lee Myung-bak called for international efforts to seek new measures to pressure the DPRK to irrevocably dismantle all nuclear weapon programs.

The US and South Korea also agreed on working-level discussions to promote their bilateral free-trade agreement.

In 2007, the two countries signed a free-trade agreement, under which nearly 95 percent of consumer and industrial products will be free of duties with three years. Most remaining tariffs would disappear within 10 years.

(CCTV June 17, 2009)