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Fox News:
www.fox43.com
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Levels of Body Armor:
bulletproofzone.com
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Fox News:

Philadelphia gunman fired 'seemingly at random,' killing 5
The suspect had a bulletproof vest, multiple magazines, an “AR-type rifle,” a handgun and a police scanner, the Philadelphia police commissioner said.

Google™ Supplements & Updates:
Levels of Body Armor:

What Do The NIJ Protection Levels Mean?
The threat levels for ballistic vests are set by the NIJ (National Institute of Justice). There are currently five levels in use - Level IIA, II, IIIA, III, and IV - and each covers a different caliber of bullet. We'll help you understand all the NIJ levels so you can assess which level defeats...

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