Scientists at NASA built a gun specifically to launch dead chickens at
the windshields of airliners, military jets and the space shuttle, all
traveling at maximum velocity. The idea is to simulate the frequent
incidents of collisions with airborne fowl to test the strength of the
windshields.

British engineers heard about the gun and were eager to test it on the
windshields of their new high speed trains. Arrangements were made, and
a gun was sent to the British engineers. When the gun was fired, the
engineers stood shocked as the chicken hurled out of the barrel, crashed
into the shield, smashed it to smithereens, blasted through the control
console, snapped the engineer's backrest in two and embedded itself in
the back wall of the cabin, like an arrow shot from a bow.

The horrified Brits sent NASA the disastrous results of the experiment
with the designs of the windshield and begged the US scientists for
suggestions.

NASA responded with a one-line memo:

"Thaw the Chicken"