Reusing machinery
is a time-honored
strategy for reducing
waste. Nearly 3,300
decommissioned U.S.
government planes and
helicopters are stored
at Davis-Monthan Air
Force Base (right) in
Tucson, Arizona, where
dry air limits corrosion.
The aircraft are scav-
enged for parts (next
photo) or restored and
returned to service.
To preserve them,
they are sprayed with
a removable protective
coating. The facility,
often called the Bone-
yard, is the largest
of its kind.
MACHINES