This is crazy...
"An odd-looking Canadian coin with a bright red flower was the culprit behind the U.S. Defence Department's false espionage warning earlier this year.The odd-looking - but harmless - "poppy coin" was so unfamiliar tosuspicious U.S. Army contractors traveling in Canada that they filedconfidential espionage accounts about them. The worried contractorsdescribed the coins as "anomalous" and "filled with something man-madethat looked like nano-technology," according to once-classified U.S.government reports and e-mails obtained by the AP."