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“We are aware of reports that a Mandiant employee’s social media accounts and personal laptop have been compromised. We are investigating this situation, and have taken steps to limit further exposure,” a FireEye spokesperson told Gizmodo. “While our investigation is ongoing, there is currently no evidence that FireEye or Mandiant corporate systems have been compromised. Our top priority is ensuring that our customer data is secure. To date, we have confirmed the exposure of business documents related to two separate customers in Israel, and have addressed this situation with those customers directly.” The investigation is ongoing, the spokesperson added.

A distinction should be made between electromagnetic sensitivity, and symptoms an individual labels as such. Researchers have failed in proving that those claiming sensitivity to electromagnetism can accurately determine the presence of a strong electromagnetic field. Nevertheless, the perceived symptoms are real for the patient, and should be honored as such, or until it can be demonstrated that they are psychosomatic or have some other physical source. Many people who meditate, for example, perceive energy movements in their body and learn to work with these. But a second distinction must be made between those who successfully work with unusual psychological states and these who find them debilitating. For the later, either drugs or meditative practice may or may not be helpful. Overcoming, defusing, or sublimating debilitating mental states is never easy.

There are several layers to the answer :-)
I've put some detailed points below, but the simplest answer is to look at the image (shrunk by the website). The centrelines of the grid are apart, and the straight edges are not entirely straight. Meanwhile the centrelines of the rings have a radius of . The outer diameter of each ring is roughly a millimetre, and you can see that it's not actually ever so round. The inner circle is a bit over half a millimetre in diameter, and looks even rougher.
BUT to keep perspective, remember that it's actually finer that 300dpi halftone letterpress dots.

1) The POSITION of the etch lines is as good as the resolution of the laser cutter.
2) The WIDTH of bare metal line in the paint is never less than the width of the laser beam, and is more if it's not focused accurately or if the mirrors are dusty. Variations in the thickness of the paint will make small differences in the width of the lines. I'm using a shared cutter that gets hammered 40 hours a week and isn't maintained properly - you could probably do better.
3) The SMOOTHNESS of each etch line is a mixture. Like all Laser cuts, there's always a slight ripple caused by the stepping motion. That is amplified by the way the heat burns the paint - the slightest hesitation and the line becomes a fraction wider. Then there's the bubbling of hydrogen - every tiny bubble slows down etching briefly in one spot until it rises to the , paint is thin and fragile - look hard at my picture and you can see places where the paint has flaked and the line wobbles - especially at corners. Be careful how you wipe bubbles in case you wipe paint.
4) UNDERCUTTING depends on the thickness of the metal - but that's the same for all chemical etching. To give you an idea, this etch is roughly wide by deep.
5) The quality of HALF-ETCHED surfaces depends on the crystalline structure of the metal. You can see that the bottoms of the grooves are pretty uniform and flat, but nothing like as smooth as the un-etched top surface. But this material is work-hardened aluminium, not annealed printing plate.
(Some of this isn't relevant to Letterpress printing, but some folk want to etch for other reasons.)

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