Greenpeace activists protest with a banner reading: "Your diesel cartel makes us sick" in front of the Federal Transportation Ministry in Berlin, Germany, Wednesday, Aug. 2, 2017. German auto bosses, ministers and state governors are considering how to reduce diesel emissions as drivers face the threat of possible bans on driving older diesel cars in some cities. A meeting Wednesday is to bring together leading politicians with bosses from Volkswagen, Porsche, Audi, Mercedes, BMW, Opel and Ford. (Kay Nietfeld/dpa via AP)