It’s a good idea to read the letter before you report on it. The FBI, is not reexamining its previous findings. It is not questioning its previous legal conclusion that “no reasonable prosecutor” could determine that charges are warranted. "The relevant paragraph in this brief letter is the middle one, where Comey writes that the FBI “has learned of the existence” of emails that it previously did not review. In response to this new information, the FBI will now “allow investigators to review these emails to determine whether they contain classified information.”Based on the letter, it appears that the FBI will simply provide the same scrutiny to these newly uncovered emails as it previously applied to the emails it already reviewed when it determined that criminal charges are not warranted."