Hillary Clinton’s Brooklyn campaign headquarters needed to be evacuated on Friday night when staffers discovered a suspicious substance inside a letter, New York Post reported.
http://nypost.com/2016/10/21/hillarys-campaign-hq-evacuated-after-suspicious-substance-found-in-letter/
According to the source, the substance was first discovered when two interns opened the letter.
The police were examining the substance. It was unclear if the substance was dangerous.