11.   Timeliness of delivery aside, should people be worried about mailed products as the Postal Service begins sanitizing mail with irradiation?

12.   Topaz is routinely modified commercially from clear to blue through ion beam sterilization, though at greater energy levels than those proposed for sanitizing the mail.

13.   Postal Service officials said the agency is working to obtain electron-beam machines that could sanitize the mail.

14.   Postmaster General John Potter said the U.S. Postal Service was increasing security at its facilities and beginning to introduce technology that can sanitize mail.

15.   In addition, irradiation gear that sanitizes the mail could be used for Olympic-bound parcels, he said Monday.

16.   Potter said the U.S. Postal Service was increasing security at its facilities and beginning to introduce technology that can sanitize mail.

17.   Sanitizing the mail would also take time.

18.   The mail is sanitized with radiation.

19.   Willhite also said the post office is investigating technology not only to sanitize the mail but also to detect biological agents.