A parent came to me at the booth with an expression of great appreciation and said, John, THANK YOU!
After the pause, he said that he cried after I gave my presentation. That was at Dallas EHDI 2009.
We talked for a few minutes about his experience of my presentation.
More at http://johnfegbert.wordpress.com/2012/03/13/what-had-happened-at-st-louis-ehdi-2012-at-dbc-booth/