Cal turned in a circle to take in the dusky space.

"They call it the Shed. No one remembers why this thing was built, but it is the biggest enclosed space available." Commander McAllen pointed to one wall. "All along there are rooms of various sizes from broom closets to meeting rooms for fifty people. Above them is an open gallery to observe the main space." He headed up the stairs. "This room at the end has a special treat." He pushed open a panel in the wall to reveal a short ...