on mesh tonight, a closer look at the violent group behind the kenya mall attack. bathes seek answers and clues to what might come next. also tonight the survival of a well oiled machine. how g.m. s factory in flint is still working for america. this product is important for the american economy. it is a work for us. the people who are the backbone, the true backbone of our economy need trucks like this to do their job. and what scientists now believe about our impact on the environment, a growing body of evidence, and an advanced look at what experts around the world agree is happening. good etching and thanks for being with us. we begin tonight with a story that is still developing, it is now heading toward a full week since it began. but the events that began with a upscale kenyan shopping mall have important implications for americans. especially in the fight against terror attacks. an international team including americans is now searching through the rub ....