COX'S BAZAR, Bangladesh -- A vast refugee camp for Rohingya, a Muslim ethnic minority group from Myanmar, stretches across a slope in Bangladesh to the horizon. As evening falls, the air is filled with the jangle of people fixing dinner, mixed with the cries of babies and the buzz of families and friends in conversation.

International relations
In pictures: The plight of Myanmar's Rohingya refugees
A grim life and uncertain future confront 670,000 people stranded in Bangladesh