It makes me cry every time. This one is especially poignant now that I'm a mom. I can't imagine feeling this way about my son, no matter how he turns out.

http://storycorps.org/listen/samuel-taylor-and-connie-casey/

also, this one, the saddest one I think I've ever heard, a little boy whose grandpa died on 9/11:
http://storycorps.org/listen/frankie-devito-and-his-mother-diana/