Following a speaking event at Prince Georges Community College in Largo last week, President Obama was greeted by a young deaf man who signed "I am proud of you" in ASL. The young man later said he was floored when the president signed back "thank you." (Video is loud; exchange starts @ 0:30.)
See also: Stephon recalls the moment he will never forget. (Transcript here.)
[distriction / boingboing.]