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NATO has suspended some joint operations and training with the Afghan Army and police. While the suspension is temporary, it raises serious questions about the role of U.S. troops in Afghanistan, and whether or not Afghans will be ready to take control of their own security in 2014.

A San Diego man is recovering today following a rare type of surgery at Thornton Hospital that left him with two beating hearts.

In Afghanistan and other conflict zones, the military is often first on the ground, followed by diplomats, contractors and journalists. Next, in many cases, are aid workers: People who work for private organizations and strive to remain impartial in some of the world's most dangerous places.

Airs Tuesday, March 2, 2010 at 8 p.m. on KPBS TV

A new San Diego Foundation report finds 23 math and science programs in San Diego County are worthy of additional financial support. KPBS Reporter Ana Tintocalis has more.

As global temperatures rise, many plants and animals are moving to higher elevations to keep their cool. But a new study found plants in northern California are actually moving downhill, where it's wetter. "These plants are tracking water availability more so than temperature," one researcher says.

A recent independent report on the Fukushima nuclear accident found that a far worse meltdown could have forced the evacuation of Tokyo's 30 million people.

The Federal Aviation Administration's budget is usually authorized for a number of years, but the most recent in a series of temporary extensions ran out in June. Democrats and Republicans are now split on how to reauthorize funding.

Researchers at Salk Institute have mapped the genome sequence of a plant - that leads the way for widespread implications for agriculture and possibly human medicines.

The earthquake that shook Chile last weekend was powerful enough to push up the Andes a few feet, shift Earth's axis and even speed up the planet’s spin. Ross Stein, a geophysicist at the U.S. Geological Survey, explains the fallout of the quake and the physics that triggered it.