siamak namazi has been held for more than seven years, and he spoke by phone to cnn's christiane amanpourgetting told that i'm going to be rescued, and deals fall apart or i get left abandoned. honestly, the other hostages and i desperately need president biden to finally hear us out, to finally hear our cry for help and bring us home. and i suppose desperate times call for desperate measures. so this is a desperate measure. i am clearly nervous. amna: namazi is one of three american citizens currently held by iran. environmentalist morad tahbaz was detained in 2018, as was businessman emad shargi. shargi was sentenced without a trial in 2020 to 10 years in prison for espionage. his sister, neda shargi, and one of his daughters, hannah shargi, join me now for an exclusive interview. welcome to you both. thank you for being here. >> you heard him speaking from inside the same prison where your father is held, your brother is held. he said it is dire, his voice was breaking. what was it like for you to hear that interview? >> it was heartbreaking. i imagined him being only doors away from t