A couple of things to watch for.
http://nakedsecurity.sophos.com/2013/04/17/malware-boston-marathon-bombing/ (http://nakedsecurity.sophos.com/2013/04/17/malware-boston-marathon-bombing/)
http://nakedsecurity.sophos.com/2013/04/18/waco-explosion-malware/ (http://nakedsecurity.sophos.com/2013/04/18/waco-explosion-malware/)