I don't really NEED an answer, I am just interested to know how you would all do it. I would put a secret compartment in an old lady's passport that contains nothing. Then, with all suspicion eradicated, no one would think to look in the lining of her left sock. The lining would be a thin sheet of blood diamond. Geeze I'm tired. I didn't even think this question through. Oh well, enjoy sharing your inner psychopath.