Many have simply walked from the city to the desert camps, a distance of 20 to 30 kilometers, says Mr. El-Mahdi. Now they confront hunger, thirst and the desert’s unforgiving sun. “The summer heat is brutal.”

Mourners from across the continent praised Helmut Kohl's vision for a united Europe

122 states—but none of the world’s nine nuclear powers—voted to ban the bomb.

Father J. Bryan Hehir believes that even the expanding reach of North Korean missiles cannot morally justify a preventive strike by the United States at this time.

"The indiscriminate and disproportionate nature of nuclear weapons compel the world to move beyond nuclear deterrence," the declaration said.

Pope Francis offered words of hope and encouragement, telling the G20 leaders that, while there are no immediate adequate solutions, “it is possible, though, to set in motion processes that can offer solutions."