Cold War - Tech Tree

This mod will cover from about 1940 till 2000 technologically, so far I have drawn up the first age (1940- mid-50s) and the second age (late 1940's to late 60's). Below is the tech tree from the second age.

http://www.civfanatics.net/uploads8/HFCWtech280.JPG

First Era Tech Tree (http://www.civfanatics.net/uploads8/HFCWtech1.JPG)

The mod will require Conquests.

This sounds very interesting.:) Maybe you should use some other tech icons than just the satellite tech icon. And you could have some techs like Space Crafts, Satellites, Ballistics, Television, etc.

The satalite icon is just one i picked so the game wont crash, i will replace them when i have the right icons and have finished the whole tree.

i wanted to do that, but didn't know how to start, you do it, thank you! :)
are you limited with the number of tech per age?

Since your time scope is quite narrow, you could actually get a little more detailed. Also, since you're starting in 1940, you can assume that the nations know Flight, Radio, and Combustion. Are you going to focus on military techs or have some social type techs as well?

Updated :

Added second era tech tree.