this was on craigs list so, i don't know how true it is but it is intersting and it's long http://atlanta.craigslist.org/rnr/366167654.html
According to Snopes it's partly true, but the original testimoney was in 1999. http://www.snopes.com/politics/soapbox/scott.asp
You can't stop someone that is willing to die from causing damage or killing you without fail. That was beaten into my head when we got briefed about how to avoid kidnappings and terrorism. In JAPAN. In the 80s. Every foreign country, you get the same brief. The Marines at the gate are just expected to hit an alarm before they go up in smoke, and hopefully send some lead downrange (although in most foreign countries they couldn't have more than a sidearm). Death is a certainty. Get a helmet. Lucky for most of us (current) civilians, criminals are typically complete pussies once they no longer have the discernable edge.