From Mr Jack DuVall.

Sir, Guy Dinmore's article "Opposition exiles train in 'non-violent conflict' tactics" (June 16) claims that the International Center on Nonviolent Conflict has trained Iranian opposition exiles in the US. This has never occurred. The article also erroneously characterised the workshops in which we are involved as "secretive" and unfairly implied that our "democratic credentials" are questionable.