On Question Time, Sir Menzies Campbell went off about the American pro-Israel lobby and its alleged influence over the Bush Administration. But Bush's real reaction to 9/11 was two-fold: he withdrew his father's troops from Saudi Arabia (America's closest ally in the world anyway, never mind under a Bush), and he declared himself in favour of a Palestinian state, making him the first President ever to use the term while in office.
Thus, to give him his due, he secured the American homeland, on which there has been no subsequent attack in nearly six years and counting.
But then, look at the actions of his predecessors: which administration, exactly, has ever been as pro-Israel as Europeans tend to assert is the default American position, and as the shriller American and other Zionists would clearly like to be the American default position? There is none.
By contrast, there is a country which really is run by an all-but-unchallenged Zionist lobby, on which see here.