Mr Hashemi said only members of Iraq's security apparatus were capable of co-ordinating such large-scale attacks.

BBC: Baghdad blasts: Hashemi accuses government over attacks

But I think the enhancements that we have made to our security over the past decade has made it much more difficult for terrorists to conduct these large-scale attacks.

WHITEHOUSE: Press Briefing

There have already been large-scale attacks in Britain.

FORBES: Chinese Take Out

In 2012, the head of MI5 Jonathan Evans said the scale of attacks was "astonishing".

BBC: Anti-cyber threat centre launched

With the exception of one incident in Glasgow, there have been no large-scale marches or organised attacks against immigrants to match those of the 1970s.

ECONOMIST: IMMIGRATION

Genentech and Novartis, in fact, have already conducted larger-scale studies showing that the drug can reduce hay fever attacks.

FORBES: Magazine Article

In August, aid groups in Afghanistan said in a report that attacks on aid workers have forced them to scale back relief work.

CNN: Taliban: Aid worker killed for preaching