Departing from Milan-Malpensa last year and going through security I'm asked by a delightful young lady who only spoke basic English to open by bag. She's sifting through the contents obvously looking for something that has shown-up on the x-ray screen while the line behind me begins to lengthen. Finally, the operator calls me over, points to the offending article on his screen and asks "what's that?". I didn't realise how prominent lead crystal appears in an x-ray.