...Or both. He may have had residue on his shoe as a way of testing airport security, and he may have been "bearding" for someone else on the flight who needed to get through. However, I doubt that they let him walk away from the five positive explosives tests without verifying that the shoes had more than the slightest trace of TATP on them.
True, but I was actually referring to the incident today. We had all eyes glued on the D concourse in the Miami airport for hours. I wounder what was going in the rest of the country?
Hopefully nothing, I am not one of the tin foil crowd, but I do think we are overdue for some sort of attack, and naive if we don't think it will happen.