Fusing the desert's quartz and feldspar sandstone with bits of the ... When the blast wave reflected from the ground, it met up with the original wave and formed the stem of the mushroom cloud.

Scientists and other workers rig the world's first atomic bomb to raise it up onto a 100-foot tower at the Trinity Test Site near Alamogordo, New Mexico. (AP Photo/File ) ...

LAS VEGAS (AP) - A huge non-nuclear explosion expected to generate a mushroom cloud in the Nevada desert will meet state air quality regulations, officials said Wednesday. State regulators have ...

In the pre-dawn dark of July 16, 1945, a searing flash lit up the New Mexico desert. A shockwave followed, rippling outward across the silent plains. This was Trinity — the world’s first nuclear ...

But it was the massive mushroom clouds from the above-ground nuclear blasts that captured the public’s imagination throughout the 1950s and early 1960s.

But it was the massive mushroom clouds from the above-ground nuclear blasts that captured the public's imagination throughout the 1950s and early 1960s.

An underground hydrothermal explosion at Yellowstone National Park sent visitors running for their lives Tuesday morning as a massive black mushroom cloud of steam and debris rose hundreds of feet … ...

Hordes of 52-ton tanks churned up choking waves of orange dust over California's Mojave Desert. Oil-drum devices released mushroom clouds to simulate atomic attack. In the 105° heat, smoke ...

A massive, mushroom-shaped cloud of smoke was spotted near New Smyrna Beach on Wednesday, leading some beachgoers into thinking a major "explosion" took place not far from the beach.