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When tensions among nations are at their height, connections among scientists can be a powerful avenue for maintaining ties and backdoor diplomacy. It worked during the Cold War, when scientists in Washington and Moscow joined together to advocate for a nuclear arms control agreement. The Obama administration is renewing the emphasis on "science diplomacy," in the hopes of building bridges in unfriendly territory and as a way to strengthen ties with allies.
Some see the so-called 'food stamp challenge' as one that builds empathy, others see it as a publicity stunt. We consider the realities -- and possibilities -- of eating well on $4 a day.