The aerospace and defence sector took off late in the afternoon, powered by Rolls-Royce.The aero-engineer said it is making progress in its investigations into an engine failure that resulted in a forced landing of one of Qantas's planes last week and has forced the Australian airline to keep its fleet grounded.Media stocks are also wanted. Among the risers is BSkyB, which has reached its target of 10m TV customers, with 36% of households in the UK and Ireland now taking its satellite TV service.Top performing sectors so far todayAlternative Energy 3,405.33 +1.29%Aerospace and Defence 3,286.78 +1.14%Chemicals 6,581.32 +1.09%Mobile Telecommunications 4,011.46 +0.71%Media 3,996.60 +0.27%Bottom performing sectors so far todayIndustrial Metals & Mining 7,686.47 -2.28%Fixed Line Telecommunications 2,095.89 -1.25%Forestry & Paper 5,493.39 -1.16%Automobiles & Parts 4,105.64 -1.01%Gas, Water & Multiutilities 4,631.60 -1.01%