UPDATE!!! June 25th. It has been pointed out that in fact there had been a sectarian incident in Derry this year after all the bragging here. It happened back in April at the "celebration" on the death of one, Margaret Thatcher. Ah, well, let's hope there are no more.
http://www.guardian.co.uk/politics/2013/apr/17/thatcher-wish-killed-inla-derry