In his video message during the high-level segment, the UN Secretary-General Ban Ki-Moon called upon the scientific community to help make sense of the complex and interconnected challenges --including climate change, the financial crisis and food, water and energy insecurity -- that threaten human well-being and civilization as we know it.

UNESCO: World Water Assessment Programme (WWAP)

When an entire programme or a shorter segment is unavailable to overseas listeners, they will hear a message informing them of the rights restrictions in place.

BBC: reaches agreement with Olympics on overseas ban

This year, the message of hope and change seems to have eluded the campaign, but for a large segment of young America, 80 million strong, those themes still resonate in how they express their aspirations and how they buy.

FORBES: Generation Y: Ready To Stand Up And Be Counted