26 February 2011
Protest and free speech
Secretary of State Hillary Clinton, speaking at George Washington University; her speech condemned governments that arrest protesters and don’t allow free speech. During her presentation, former CIA analyst Ray McGovern stood in the aisle and turned his back on her in silent protest; he was dragged from the room by her security staff.
(There may be a more detailed backstory with some justification; I haven't found it yet.)
Found at Metafilter, where there is a long discussion thread.