The agent was very polite, and she just patted around my collar bones a little. I'm just annoyed that it happened--after 4 years of going through all sorts of imaging with no hitch. It seems to me that a row of staples on the sternum of a gray-haired person shouldn't be any more remarkable (or harder to identify) than freckles...I used to keep my Medtronic card in my pocket for screening, but with the advanced imaging machines nothing is allowed in pockets.