CNN EarlyStart May 31, 2013 09:08:00
President and mayor bloomberg never reached them, both were intercepted where letters are screened. white house spokesman jay carney emphasized in the past when other threatening letters were september to the president. >> the mail is screamed. the mail sent here is screamed and these tests are taken at remote sites to mitigate the risk to them and the general population. >> reporter: the fbi is testing the letter sent to president obama and meanwhile the new york city department says the preliminary testing on the bloomberg letter came back positive for ricin, a potentially deadly poison made...