Barack Obama calls for a purge on the world's nuclear weapons. His warnings of proliferation were accompanied by the possibility of nuclear-armed terrorists. He unveiled a plan to cut stockpiles, curtail testing, choke fissile production and secure loose nuclear material. "As the only nuclear power to have used a nuclear weapon, the United States has a moral responsibility to act," he said. His speech was warmly received.

South Korean military officials announced that they would be deploying two war ships, one on the east coast and one on the west coast of the country. The ships are equipped with missile defense systems and were the latest response to North Korea's increasingly hostile actions and statements.