[wideminded]

I went on a tour of a B17 recently at an air museum. The most surprising thing to me was the narrow bridge/catwalk running through the bomb bay area that was the only way to get between the front and rear of the plane.

[Windflier]

The most surprising thing to me was the narrow bridge/catwalk running through the bomb bay area that was the only way to get between the front and rear of the plane.

Here's a view of that narrow catwalk through the fuselage.

From below, in the bomb bay: