1.   An assistant to Tom Brokaw at NBC News in New York City contracted cutaneous anthrax from a letter that contained the bacteria in a granular substance.

2.   The anonymous letter, which bore no return address, contained an unspecified threat and a brown granular substance, Mawn said.

3.   The president of NBC News, Neal Shapiro, said that when the clerical employee opened it, a brown granular substance fell out.

4.   Hundreds of other people were evacuated from the buildings because of the possibility the gray granular substance could be hazardous, police said.