The secret back channel of negotiations between Iran and the United States, which led to this month’s interim deal in Geneva on Iran’s rogue nuclear program, has also seen a series of prisoner releases by both sides, which have played a central role in bridging the distance between the two nations, the Times of Israel has been told.

In the most dramatic of those releases, the US in April released a top Iranian scientist, Mojtaba Atarodi, who had been arrested in 2011 for attempting to acquire equipment that could be used for Iran’s military-nuclear programs.