what can we do for you? at shell, we believe the world needs a broader mix of energies. that s why we re supplying cleaner-burning natural gas to generate electricity. and it s also why, with our partner in brazil, shell is the eighth producing ethanol, a biofuel made from renewable sugar cane. a minute, mom! let s broaden the world s energy mix. let s go. and now, bbc world news. hello and welcome to bbc world news. i am george alagiah. top officials arrived in london four days before the opening ceremony. the ioc president says he will not be playing the blame game regarding security. deadly attacks across iraq. reports of continued fighting in as assadecond city orders efforts to be redoubled. just to take a look at this four days to go until the opening ceremony. on friday, the athletes will gather in this stadium behind me and the world s biggest sporting event will begin. it has been a wet summer so far in britain. the forecast is pretty good. the tran