Going through SFO on Sunday, the TSA agent working the controls behind the X-ray screen sneezed into his hands. A colleague looked up at him, and then he sheepishly ceded his seat to the other agent and put on new gloves. As I was packing up my things on the other side of the metal detector, I saw him chatting with a more managerial looking TSA agent. Not sure what conclusion to draw from the brief observations, but it did leave an impression.