This is a bit of light relief from an internal web site here at
Netscape. Apparently, it has been excerpted from Masquerade: The
Amazing Camouflage Deceptions of World War II, Seymour Reit (Signet,
1980):

Another enemy decoy, built in occupied Holland, led to a tale
that has been told and retold ever since by veteran Allied
pilots. The German airfield, constructed with meticulous care,
was made almost entirely of wood.

There were wooden hangars, oil tanks, gun emplacements, trucks,
and aircraft.

The day finally came when the decoy was finished, down to the
last wooden plank. And early the following morning, a lone RAF
plane crossed the Channel, came in low, circled the field once,
and dropped a large wooden bomb.