Biden: Boston Bombers 'Knock-Off Jihadis' VICE PRESIDENT BIDEN: I asked almost every day since 9/11, "Why?" Why? Why? This latest phenomenon at the beginning of the 21st century. Why? People say to me, "For they surely know they can never defeat us. They can never overthrow us. They can never occupy us. So why? Why, whether it’s al-Qaeda central out of the Fatah or two twisted, perverted, cowardly, knock-off jihadis here in Boston. Why do they do what they do?