(FILES) This file photo taken on May 23, 2016 shows Bayer CEO Werner Baumann speaking to the press at the Bayer headquarters in Leverkusen, western Germany. German chemicals giant Bayer said on September 14, 2016 it had signed a $66 billion (58.8 billion euros) takeover deal with US genetically modified (GM) seeds firm Monsanto. / AFP PHOTO / Roberto Pfeil