Recently returned from the USA out of SFO. Upon opening our suitcase at home the wife noticed that the clothes had been rifled and were not neat and tidy as she packed them. Inside was a notice from some US government agency that said our case had been selected for checking. The lock had been forced to gain entry. Its not until you are back in this country that you realise that the case has been opened. I think its a 'bloody cheek' my wife says. You should be asked to accompany your case if its about to be checked so that you have control over what actually happens. We still do not know if anything has been pilfered.