"The Obama administration has announced a new policy to handle the risks posed by legitimate biological research that could, in the wrong hands, threaten the public."

"World leaders may pledge tighter controls over nuclear materials to keep them out of the hands of terrorists, according to the draft of a communique to be released at the end of their two-day meeting in Seoul."

"Securing vulnerable nuclear material before the next Nuclear Security Summit in 2014 is the top priority, according to a copy of the six-page working document obtained by Bloomberg News. The draft, completed at a March 23 meeting of nuclear advisers attending the meetings in the South Korean capital, will be subject to debate at the gathering that ends tomorrow.

"Fresh water supplies are unlikely to keep up with global demand by 2040, increasing political instability, hobbling economic growth and endangering world food markets, according to a U.S. intelligence assessment released on Thursday."

"WASHINGTON, DC -- For decades, affluent families have flocked to Spring Valley, a quiet neighborhood hugging the northwestern boundary of the nation’s capital. True to its name, magnolias are blooming and daffodils carpet the yards. But during World War I, soldiers called it Death Valley. It was here that the Army cooked up chemical weapons, launched poison-packed mortar shells and sent gas clouds billowing over the fields."

"The memory and attention problems plaguing thousands of veterans from the first Gulf War might be caused by low-level exposure to insecticides and nerve gas, said researchers at Georgia Health Sciences University."

"Ben Kessler, a student at the University of North Texas and an environmental activist, was more than a little surprised that an FBI agent questioned his philosophy professor and acquaintances about his whereabouts and his sign-waving activities aimed at influencing local gas drilling rules."

Coltan ore is valuable as a source of niobium and tantalum, metals key to many kinds of electronics. Coltan mining has helped finance war in places like the Democratic Republic of Congo. Now new illegal coltan mining activity has sprung up in the remote Amazon jungles on the border between Venezuela and Columbia. It is controlled largely by armed militias and drug smugglers.

"President Barack Obama on Sunday told a pro-Israel lobbying group that 'loose talk of war' was only serving to benefit Iran because it was driving up the price of oil."

"Bird flu experts meeting in Geneva ruled that controversial research on a mutant form of the virus potentially capable of being spread among humans should be made public."