When 36-year-old Princeton University graduate student Elizabeth Tsurkov was kidnapped in Iraq, it set off a grueling 903-day fight her sister never expected. "I honestly was so naive when she was kidnapped . I had no idea what it would take," Elizabeth's sister, Emma, told "CBS Sunday Morning." In March 2023, Elizabeth — an Israeli Russian dual citizen — was abducted off the street and held for ransom by members of Kata'ib Hezbollah, a terrorist organization based in Iraq and funded by Iran.