What photo doesn't belong?

One of these photos doesn't belong with the other two. Which one is it?

Photo # 1.

Deaf person attending public event.

 

Photo # 2.

Distinguished professor of education,
U. of Illinois.

Photo # 3.

WWII B-29 bomber crew.

 

That's RIGHT!

Photo #3 does NOT have a flag in it.

You would THINK that active duty SERVICEMEN (!) about to participate in the Doolittle raid on Japan -- six of whom were later to die as a result of Japanese vivisection experiments after they were captured -- would be precisely the people who WOULD display the American flag in any photo they appeared in.

What exactly is the MATTER with people like that?! I, for one, question their patriotism.