Barnum & Bailey midget performers are responsible. They are unemployed with extra time on their hands.
The responsibility for the London attacks lies with the British government who allowed these barbarians in even after they saw the handwriting on the wall when muslims demanded sharia law in Britain.
The British government owe their citizens an apology just as the US government owe their citizenry apologies for the many muzzies that are presently making this country an unsafe country to reside in.
But politician and accountability is an oxymoron.