Disclosed is a method for slowing down the spread of viruses by limiting the number of Transmission Control Protocol connection attempts to arbitrary Internet Protocol addresses that can be in progress at any given time\u2014a common method employed by viruses to spread to other hosts from an infected host. A source for emitting electromagnetic radiation is provided. The ink-filled ink pack is housed in the lower case, and the upper case is laid on the lower case from above. This thereby minimizes unwanted heating effects during the microwave bonding process. The controller is configured for controlling the pitching, rolling and yawing drive units in response to control inputs.