Thich Nhat Hanh came to Washington, DC in October 2011 to give public talks at the Library of Congress and the Warner Theater and to lead a retreat Congress.  People from the Washington Mindfulness Community http://www.mindfulnessdc.org/ and other local mindfulness practice groups walked the marble halls inviting members of Congress and gathered to feed the monks and nuns who accompanied Thich Nhat Hanh or Thay as he is called.  The article in the Mindfulness Bell describes aspects of Thich Nhat Hanh’s visit:

http://www.mindfulnessbell.org/articles/mb59.pdf

When the cover appears scroll down to pages 44-45.