[Shermy]

...If the science offers few leads, old-fashioned police work might. In Florida, investigators focused on a one-page, handwritten love letter addressed to Jennifer Lopez, NEWSWEEK first reported on its Web site. It was sent to The Sun, says a source, in Lantana, Fla. It reportedly arrived sometime after Sept. 17. Staffers laughed over it and passed it around the third-floor editorial offices. Enclosed was a small Star of David and a tablespoon or so of a bluish substance that resembled dishwashing powder. Bob Stevens was among those who handled the letter. As one staffer recalled to NEWSWEEK, “The only difference between Bob and those who watched him open it was that Bob [who had poor eyesight] held it up to his face.” Stevens’s spartan workstation—Macintosh computer, a mousepad decorated with photos of his friends, crayon drawings from a colleague’s young son—was a hot spot of anthrax. So was a receptacle in the mailroom, where Blanco and Dailey worked. But how five additional employees were exposed (blood tests came back positive over the weekend) is a mystery: some work for The National Enquirer, whose offices are “way the heck down the hall and around the corner,” says The Sun’s Carla Chadick

[Shermy]

From post 9:

...If the science offers few leads, old-fashioned police work might. In Florida, investigators focused on a one-page, handwritten love letter addressed to Jennifer Lopez, NEWSWEEK first reported on its Web site. It was sent to The Sun, says a source, in Lantana, Fla. It reportedly arrived sometime after Sept. 17. Staffers laughed over it and passed it around the third-floor editorial offices. Enclosed was a small Star of David and a tablespoon or so of a bluish substance that resembled dishwashing powder. Bob Stevens was among those who handled the letter. As one staffer recalled to NEWSWEEK, “The only difference between Bob and those who watched him open it was that Bob [who had poor eyesight] held it up to his face.” Stevens’s spartan workstation—Macintosh computer, a mousepad decorated with photos of his friends, crayon drawings from a colleague’s young son—was a hot spot of anthrax. So was a receptacle in the mailroom, where Blanco and Dailey worked. But how five additional employees were exposed (blood tests came back positive over the weekend) is a mystery: some work for The National Enquirer, whose offices are “way the heck down the hall and around the corner,” says The Sun’s Carla Chadick..."

I don't know if receptacle would be a trash can, or not.