Few things spark the imagination like a good old treasure hunt, and there's a big one underway in the Netherlands this week. Officials in the European country have published an old map, believed to reveal where soldiers invading from Nazi Germany hid millions of dollars in riches that they'd looted during World War II. The high-pitched hum from a metal detector tells treasure hunter Jan Henzen that he could be getting closer. "I'm quite tickled," he says. "I've been searching this area for 30 years and have found some nice Roman objects, but I never knew Nazi treasure was buried...