The following is the full text of the open letter from 38 former Canadian ambassadors, protesting the Harper government's attacks on Richard Colvin: The issues raised by the Richard Colvin affair are profound. Colvin, a Foreign Service Officer dedicated to discharging his responsibilities to the best of his ability under difficult circumstances, was unfairly  subjected to personal attacks as a result of his testimony provided in response to a summons from a parliamentary committee. While criticism of his testimony was perfectly legitimate, aspersions cast on his personal integrity were not. A fundamental requirement of a Foreign Service Officer is that he or she...