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The B-58 Hustler was the pride of the U.S. Air Force during the Cold War . The first wedge up to of shoot Mach 2 ( twice the f number of sound ) , it was designed to strike down nuclear arm into the Soviet Union in the earned run average before intercontinental missiles took over that task .

But the bomber ’s exclusion capsule had some design flaws — an entire flight work party was killed in one test flight , according toio9.com , so engineers developed a stronger forcing out capsule . After testing the capsule on the ground using hoi polloi recruited from unemployment lines , the Air Force begantestingthe ejection capsule in the air — using livebears , grant to intelligence reports .

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A bear is strapped into an ejection capsule during Cold War bomber tests.

approximate the size of an adult human male , Americanblack bearsand Himalayan bear were pick out to be strapped into the expulsion capsule after being drugged with sedative . The abridgement were ejected at varying f number and altitudes , and after chute down to Earth , the capsule were open and the bear were examined , io9.com reports .

None of the beast die during the run , though there were some serious injuries , include brawniness damage , internal hemorrhaging and broken ivory including two pelvic fractures in one of the bears . A video outlining the Air Force testing program can be seenhere , though parts of the video may be disturb for some viewers .

two black bears lounge in a tree

a rendering of a futuristic fighter jet in the sky

a sharp, slender aircraft flies across a red and yellow cloudy background, creating ripples behind it

a head-on photograph of the X-37B space plane on a runway at night

A reconstruction of an extinct Miopetaurista flying squirrel from Europe, similar to the squirrel found in the U.S.

The shadowy outline of four surface to air missiles against a cloudy sky

brown bear

A large male polar bear returns to feed on a fin whale carcass.

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yellowstone grizzly bears

knut polar bear

arctic habitats, environment

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an illustration showing a large disk of material around a star

a person holds a GLP-1 injector

A man with light skin and dark hair and beard leans back in a wooden boat, rowing with oars into the sea

an MRI scan of a brain

A photograph of two of Colossal�s genetically engineered wolves as pups.

selfie taken by a mars rover, showing bits of its hardware in the foreground and rover tracks extending across a barren reddish-sand landscape in the background