'Whom' is used when you are referring to the object of the verb. 'Who' is used when you are referring to the subject of the verb.'Who is there?''Who broke that vase?''For whom is that parcel...
Bin Laden had a large following of radical extremists trying to convince young boys [ 8-, 10-, and 12-year olds ] to put on a suicide belt and go out and kill as many people as possible, when the...