  In this paper we examine the information sharing practices of people living
in cities amid armed conflict. We describe the volume and frequency of
microblogging activity on Twitter from four cities afflicted by the Mexican
Drug War, showing how citizens use social media to alert one another and to
comment on the violence that plagues their communities. We then investigate the
emergence of civic media "curators," individuals who act as "war
correspondents" by aggregating and disseminating information to large numbers
of people on social media. We conclude by outlining the implications of our
observations for the design of civic media systems in wartime.
