By Christina Ruffini, David Martin, Ed O'KeefeThe ISIS leader responsible for the planning of the 2021 attack at the Kabul airport that took the lives of 13 U.  "They could not tell me any details of the operation, but they did state that their sources are highly trusted, and they've got it from several different sources that this individual was indeed killed," Hoover said in an interview Tuesday.  CBS News correspondent First published on April 25, 2023 / 5:34 PM