In many parts of the world, knife crimes are on the increase. There have been many disturbing attacks, but one attack which was particularly distressful was on a woman in Brooklyn, New York, who had her throat cut by a stranger while she was walking on the street in broad daylight:
https://nypost.com/2017/10/20/slashing-victim-details-terrifying-moment-a-stranger-cut-her-throat/
Here is a good analysis of the situational awareness needed to avoid such attacks:
http://www.activeresponsetraining.net/bad-survival-math-fail-to-recognize-assaultive-behavior-denial-throat-cut
