[runjake]

You are correct about the airframe, but the airframe wasn't what I was referring to.

http://en.wikipedia.org/wiki/Radar-absorbent_material

Active countermeasures aren't very stealthy except when you're attacking a specific detection system.

[Retric]

Declassified info from 1945 :) page 21 shows some jamming equipment for a B-17. Page 24 even has some spoof equipment for when you want to pretend you brought some friends along.

http://www.scribd.com/doc/33263034/WWII-Radar-Countermeasure...

PS: And it just keeps going and going. It's crazy to think how far the cat and mouse game was even all the way back then.