A selection of photos from the day in Tehran, shown on the online New York Times:
Security forces ready to break up crowds of demonstrators.
(Photo: Agence France-Press / Getty Images - NYT 6/20/09)
A man holds a police baton -- his trophy for surviving the day.
(Photo: Tehranreporter, via Demotix / NYT 6/20/09)
Protesters assemble behind a demonstration of defiance and hope.
(Photo: New York Times - 6/20/09)
NOTE: The death of at least one demonstrator has been reported today.