Science can't design away tornadoes' deadly threat

(AP) -- Storm science has greatly improved tornado warnings in recent years. But if that's led anyone into a sense of security, that feeling has taken a beating in recent weeks.

Twitter chief picked as Obama telecom advisor

US President Barack Obama named Twitter's chief and a high-ranking Microsoft executive among a handful of technology veterans to be appointed as telecommunications security advisors.

China drought affects more than 34 million people

A debilitating drought along China's Yangtze river has affected more than 34 million people, leaving farmers and livestock without water and parching a major grain belt, according to the government.