WMD plant finally opens for inspection

OAK RIDGE, Tennessee (AP) -- The government is offering a rare glimpse of the massive machines used to enrich uranium for the "Little Boy" bomb -- the first atomic weapon used in war, dropped 60 years ago in August on Hiroshima, Japan.

Inside the high-security Y-12 nuclear weapons plant remain the last of 1,152 calutrons that once filled nine buildings. The machinery was part of the top-secret bomb-building Manhattan Project, which turned this rural countryside about 30 miles west of Knoxville into a "secret city" of 75,000 people between 1942 and 1945.