Amir Khan use to have a glass jaw but he's fixed it by building his neck muscles and will have better chin support now. It was a mistake that nobody pointed this out to Khan that his neck looked really skinny before. I would love to see Khan-Garcia again and this time Khan will beat up Garcia.
Margarito and Wayne McCullough, incredibly skinny necks, yet fantastic chins. Building a strong neck does not ensure a sturdy chin.
There's video footage of him getting knocked out, I don't think he gives a **** what wikipedia says. You sound like a very insecure man, projecting your own fears onto somebody else. And I'm not a Khan fan at all.