In a little-noticed migration with implications for both greater Washington and the valley, several federal agencies, including the FBI, are relocating operations to the I-81 corridor. Helping drive the shift is the government's emphasis on security in a post-Sept. 11 world, which turns Winchester's location 75 miles from Washington into a geographic ideal. It is far enough from the capital to escape the fallout of a nuclear explosion - a distance often estimated at 50 miles - but still close enough so that employees can get to the District relatively easily when they need to.
