North Korea’s warnings of a nuclear war and its call on foreigners to leave South Korea by Wednesday are raising concern among U.S. defense officials. They say the U.S. is ready to respond to any aggression against its South Korean ally. VOA Pentagon correspondent Luis Ramirez reports on how the crisis - the deepest in decades - has unfolded.
H7N9, the latest variant of the avian flu virus, has spread 700 kilometers across three Chinese provinces since it was identified last month. With researchers struggling to identify how the disease is transmitted, concern is mounting about its danger to humans. Ivan Broadhead has this report from Hong Kong.
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