AllNews'Khalifa Umar Mansoor' - 1 News Result(s)Pakistan Says School Attack Mastermind Killed By US DroneWorld News | Associated Press | Wednesday July 13, 2016 Pakistan's military says the mastermind of a 2014 attack on an army-run school has been killed in a US drone strike. www.ndtv.com'Khalifa Umar Mansoor' - 1 News Result(s)Pakistan Says School Attack Mastermind Killed By US DroneWorld News | Associated Press | Wednesday July 13, 2016 Pakistan's military says the mastermind of a 2014 attack on an army-run school has been killed in a US drone strike. www.ndtv.comYour search did not match any documentsA few suggestionsMake sure all words are spelled correctlyTry different keywordsTry more general keywordsCheck the NDTV Archives:https://archives.ndtv.com