Threats Against 2 Irvine Professors

Two professors at the University of California at Irvine received envelopes Monday with the words "Black Death" written on them, and with an unidentified white powder in them, the Associated Press reported. Authorities are testing the white powder to determine what it is, and initial tests were negative for biohazards. The buildings where the two professors work -- one in sociology and the other in engineering -- were evacuated.