A lead abatement method approved for use by governmental agencies is described. The method and apparatus of the present invention make use of communal filters and randomization to determine which client devices will output a message that is to be broadcast to a community of client devices. The camera is used to monitor the illumination spot formed on the object by the beam projected through the system’s objective. The pipe has a diameter substantially less than a diameter of a duct at the first end. A requesting server seeking a specific data file is configured to identify a data object description of the requested data file in a request transmitted to the search engine. The shell releases drug from the core by permitting diffusion of the drug from the core.