Bergman's articles are often based on classified military and intelligence material to which he has been granted exclusive access. Over the years, he has brought to light numerous issues of considerable public interest, including: the diversion of Palestinian tax revenues to the personal bank account of Yassir Arafat; the production of fertilizer from the bones of Holocaust victims at an Italian factory during World War II; the sale by an Israeli businessman of dual-use chemical raw materials and technology to Iran; the medical file of Prime Minister Rabin compiled on the night of his assassination; the case of “Agent Babylon,” the aide to Egyptian President Sadat who was an Israeli spy; the first interviews ever published with members of the Mossad's special ops unit; medical experiments conducted on Israeli soldiers as part of joint U.S.-Israeli efforts to develop a vaccine against anthrax; and various institutional corruption scandals in Israel.