President Obama is calling for more sanctions on Iran to halt that country's nuclear enrichment program. Some argue that sanctions are ineffective, and are having unintended consequences such as harming Iranian university students in the US.
To protect endangered populations of fish, scientists are devising new techniques that can identify where a fish was caught. This should enable regulators to make sure fish being sold are from sustainably harvested populations. Ari Daniel Shapiro reports.
The last time North Korea had a transition of power, people in the South feared the outbreak of war. Now they're taking it in stride. And as Jason Strother reports, some see the change as an opportunity for South Korean business.