Envelopes containing suspicious powder were sent through the mail to at least seven locations in Manhattan, primarily Wells Fargo banks, police officials said.
"This is a reminder that you are not in control," said a message that arrived with the envelopes. "Just in case you needed some incentive to stop working we have a little surprise for you. Think fast you have seconds."
Several samples tested negative -- evidently containing corn starch, police said. Later, all the powder samples were...Full Story