FORT LEE, Va. -- Heavy equipment workers nudge a T-12 "earthquake" bomb into place as a permanent display item here. Hailed as the largest conventional air-dropped piece of munitions ever built, the bomb was conceived by the U.S. Army Ordnance Department during the closing months of World War II. Only 57 were built. The bomb was previously displayed at Aberdeen Proving Ground, Md. It is one of the many artifacts being relocated to Fort Lee, which has become the new "Home of Ordnance" as part of the Base Realignment and Closure legislation of 2005.