If I remember it correctly, that show on Discovery channel was anti gun. It pissed the hell out of me.
Anyway here is the official link to Ballistic Resistance of Personal Body Armor (NIJ Standard—0101.04). Download the file, it is in PDF format.
http://www.ojp.usdoj.gov/nij/pubs-sum/183651.htm
If you want to get the a quick summary of it try this page
http://bulletproofme.com/Ballistic_P...n_Levels.shtml