By A Mystery Man Writer
A .22 caliber bullet hitting Kevlar. The bullet is travelling at 660 feet per second (220 meters per second). EDWARD KINSMAN/SCIENCE PHOTO LIBRARY
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Kevlar bullet hi-res stock photography and images - Alamy
540+ Kevlar Bullet Proof Vest Stock Photos, Pictures & Royalty-Free Images - iStock
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Kevlar bullet hi-res stock photography and images - Alamy
Kevlar bullet hi-res stock photography and images - Alamy