This is why:
The Mysterious Radioactive Cheese Grater
Every time a truckload of scrap metal arrives at Genesee Recycling in Flint… the metal is screened by radiation monitors.
In August… the alarms went off… sending workers scrambling with hand-held radiation detectors to find the contaminated item. Surprisingly… their detectors led them to this simple kitchen utensil.. a cheese grater.. stamped with the words “Made In China.”
Makes you wonder what would happen if you strolled through WalMart with one of these:
NUKALERT 24/7 Radiation Monitor and Alarm
http://www.nukalert.com/