Shaykh Osama Bin Ladin said:
“Know that targeting the Americans and Jews by killing them throughout the globe is the greatest duties and leading righteous acts to Allaah, the All-Mighty. I advise them to gather around the truthful scholars and sincere acting preachers.
I also advise them to execute their requirements in secrecy, especially with regard to jihadi military operations.”
[Taken From, “In Remembrance of Usama”, p.11]