Originally Posted by
bigmac3011
Would the knee even alarm a WTMD at the Pre-Check? In Detroit they told me to leave everything in my pockets (keys, change, etc.) with the exception of my cell phone, which suggests that the WTMD sensitivity is turned way down.
Yes, but that can vary from airport to airport. I've alarmed the WTMD with a metal belt buckle, and we've all heard tales of underwire bras alarming the WTMD. Likewise, the amount of metal in a repaired knee can vary wildy from person to person, due to differences in the injury and the preferences of the surgeon.