If you get security screened with a laptop, make sure you remember to pick it up afterwards. About 18 months ago, a colleague of mine was in transit from Europe to MFE via DFW. At DFW, they pulled him out for secondary screening as he was boarding and took his laptop out for another scan. It took ages for the screening so when they were finally finished, he grabbed his briefcase and jumped on the plane.

It was only in the hotel bar in Mexico that evening (just over the border from MFE) that he realised that his bag was lighter than it should have been - yes, the laptop was still in DFW!!

Fortunately for him, he had a colleague travelling down from DFW the next day and she managed to get it back from security for him...