Scientists study rare bloom in the Atacama Desert, one of the driest places on Earth

Wildflowers are blooming in the Atacama Desert, an inhospitable stretch of land west of the Andes Mountains that normally gets just 2 millimeters of rain every year. But this July and August, a rare alignment of conditions led to a beautiful, fleeting burst of color that has drawn tourists and scientists alike. William Brangham reports.