Datong, which provides systems to help government agencies gather information on terrorism and organised crime, is leading the electronic and electrical equipment sector higher after saying it has performed well despite tough economic conditions.Elsewhere in the world of national security, BAE Systems is under attack and leading the aerospace and defence sector lower as the arms dealer awaits a decision from the Attorney General on whether it should face prosecution over alleged bribery in the Czech Republic, Romania, Tanzania and South Africa. Top performing sectors so far todayIndustrial Transportation 1,981.42 +1.63%Electronic & Electrical Equipment 1,554.77 +0.77%General Industrials 2,027.85 +0.59%Mobile Telecommunications 3,230.08 +0.54%Support Services 3,524.00 +0.43%Bottom performing sectors so far todayForestry & Paper 3,242.18 -2.56%Mining 17,127.63 -2.50%Automobiles & Parts 2,606.94 -1.94%Aerospace and Defence 2,867.60 -1.81%Insurance (non-life) 1,333.34 -1.56%