South Korea on Wednesday test-launched a new ballistic missile that can hit all of North Korea, the president's office said, developed under a new agreement with the United States that lets Seoul extend the weapon's range to up to 800 km (500 miles).
The United States will extend its cyber defense umbrella over Japan, helping its Asian ally cope with the growing threat of online attacks against military bases and infrastructure such as power grids, the two nations said in a joint statement on Saturday.
The United States tried to deploy a version of the Stuxnet computer virus to attack North Korea's nuclear weapons program five years ago but ultimately failed, according to people familiar with the covert campaign.
The United States and two key Asian allies discussed how to increase pressure on North Korea to halt its nuclear program and will urge China to help bring Pyongyang back to the negotiating table, officials said.
