Milestone anniversaries mark the point when events move from living memory to more symbolic.
The photos taken on Bloody Sunday have played different roles in commemorating the events of the day over the last 50 years.
Some of those who’ve grown up after the 1998 Good Friday Agreement are drawn into paramilitary groups due to a lack of power, protection and belonging.
Despite a year as UK City of Culture in 2013, Derry remains a place where poverty and worklessness are commonplace. Now it is mourning the loss of journalist Lyra McKee.