Vice versa
Here is what you do with to much time on your hand. The following photos are of my Dad during the Korean War visiting me duringthe Gulf War and vice versa. Can you tell the difference?

 
Oman desert 1990
Oman desert 1990
Korea 1950's
Korea 1950's

 
Saudi Arabia 1991
Camp Pendleton 1991
Camp Pendleton 1990