The Volgograd bombings have shown that even without a claim of responsibility that links them to the Games, terrorist attacks elsewhere in Russia can have almost as great an impact on World opinion as an attack on Sochi itself.
It is important that the public do not allow the events of 7/7, or any terrorist activity, to fundamentally re-shape the way they go about their everyday lives, but it is important that we acknowledge that the events of 7/7 can still be causing psychological distress to those who were most significantly affected by it as well as the general public.
The Coroner presiding over the inquests of those who died on 7 July 2005 has ruled she will hear evidence on whether MI5 and the police could have prevented the attacks. The Government is now deciding whether to go along with this, challenge it in court or even stall the inquests and hold a public inquiry instead.
Government policy since 7/7 has placed equal importance on tackling terrorism at the grassroots level. 'Community-based counter-terrorism' might be at the so-called 'soft' end of the security spectrum, but it is the hardest to get right.