Hi Charles,
From the post text:

As Glenn Beck does his best impression of Joseph McCarthy and tries to get White House Communications Director Anita Dunn hounded out of office for quoting Mao Zedong in a speech several years ago,

The speech in question was made at the commencement in June 2009 at St. Andrews Episcopal School, held at Washington National Cathedral - here’s a link to the announcement.

(Just in case there are nitpickers out there from Beck’s research staff.)