<p>After a plane journey in shackles, an Iranian woman found herself in the middle of Africa in a country she did not know existed. She is one of thousands deported from the US on the back of shadowy deals made with dozens of countries. An in-depth investigation reveals the ‘show of force’ costing American taxpayers millions</p><p>No one would tell the shackled detainees onboard the US immigration plane where they were going. The officers in charge would taunt them when they asked, they said. It