Editing Bulletproof vest (section)

===Standards update US and UK===
[[File:MPS officers supervising World Cup, 2006.jpg|thumb|left|Metropolitan Police officers conducting crowd control, 2006]]
As vest manufacturers and the specifying authorities worked with these standards, the UK and US Standards teams began a collaboration on test methods.<ref>[http://www.justnet.org/TechBeat%20Files/StabStndSpr2000.pdf "Taking the Stab Out of Stabbings"]{{Dead link|date=November 2018 |bot=InternetArchiveBot |fix-attempted=yes }}. [http://www.justnet.org/Pages/TechBeatIssue.aspx?issue=Spring+2000 ''TechBeat'', Spring 2000 (whole issue)]{{dead link|date=December 2017 |bot=InternetArchiveBot |fix-attempted=yes }}, p. 1 ([[Portable Document Format|PDF]] version).</ref> A number of issues with the first versions of the tests needed to be addressed. The use of commercial knives with inconsistent sharpness and tip shape created problems with test consistency. As a result, two new "engineered blades" were designed that could be manufactured to have reproducible penetrating behavior. The tissue simulants, Roma clay and gelatin, were either unrepresentative of tissue or not practical for the test operators. A composite-foam and hard-rubber test backing was developed as an alternative to address these issues. The drop test method was selected as the baseline for the updated standard over the air cannon option. The drop mass was reduced from the "ice pick test" and a wrist-like soft linkage was engineered into the penetrator-sabot to create a more realistic test impact. These closely related standards were first issued in 2003 as HOSDB 2003 and NIJ 0015. (The Police Scientific Development Branch (PSDB) was renamed the Home Office Scientific Development Branch in 2004.)<ref>[http://www.homeoffice.gov.uk/documents/ho-annual-report-0405/annrep2005-0-complete The Home Office Departmental Report 2005] {{webarchive|url=https://web.archive.org/web/20080602082320/http://www.homeoffice.gov.uk/documents/ho-annual-report-0405/annrep2005-0-complete |date=2008-06-02 }}, p. 19. [[Home Office]], June 2005.</ref>