The towers exploding against the crystalline blue sky, the white dust cascading, the panicked office workers — these are all seared in collective memory.
"Sometimes these big balloons of dust will cascade to the floor".
But the clouds of dust that cascaded upward into the stratosphere affected the entire planet for the rest of the year on the same scale — except that the effects themselves were of a profoundly different kind.
Ultrasharp radio images reveal a rapidly moving shock wave where the winds collide, periodically creating fine dust that cascades into space.
On its third or fourth run, the B-52 dropped a tremendous bomb on the summit of a Taliban ridge — perhaps a thousand feet above the valley floor — sending a giant brown-gray cloud of dust and dirt cascading down the mountainside and eventually covering it, like an avalanche.
He had seen a YouTube version of the glory cloud and was somewhat skeptical, believing that it might be simply a cascade of dust from the ceiling of the church.
Yet all that is a handful of dust compared to the cascades of data about yourself that you shed daily.
The mortar between them crumbled at my touch, coming away in small cascades of white dust.
Trapped several feet apart, injured, unable to move, faces caked in dust, they think that every fresh cascade of concrete will kill them.
This ball of ice and dust is responsible for a meteor shower called the Beta Taurids, which cascade into Earth's atmosphere in late June and July - the time of the Tunguska event.
Cinderblock slums collapsed in cascading layers of concrete and dust, government buildings were reduced to rubble and panicked crowds were left trapped, homeless or in the dark as night fell in areas with few emergency resources.
