the cold war, an explosion occurred when the submarine, called "echo ii," was being refueled at a soviet navy base in the sea of japan. ten crew members were killed and 290 are thought to have been exposed to radiation. the soviet government had never revealed details of the accident on grounds that they were top military secrets. the sub had been kept off limits since the accident. dismantling work will continue until november, but the reactor, which is still highly radioactive, will remain sealed and kept at a nearby facility. >>> now for a business update with ines matsuyama. ines? >> thank you very much, catherine. >>> the u.s. central bank says the american economy has continued to grow overall but the pace of growth has slowed in some districts. that's a slight downgrade from the bank's previous assessment. the federal reserve released its latest beige book survey of business sentiment on wednesday. it shows economic activity slowing in june and july in 2 of the 12 federal reserve districts in the country. they are the midwestern region of chicago and the southern region of atlanta. by