I believe the blue is the second stage igniting. Heavy nitrogen content in the Titan II's solid fuel, which lends it that color. There is a prima facie decent a

I believe the blue is the second stage igniting. Heavy nitrogen content in the Titan II's solid fuel, which lends it that color. There is a prima facie decent analysis and a different, good video over on Reddit: https://np.reddit.com/r/LosAngeles/comments/3s06dt/op_delivers_best_footage_of_ufo_missile_test/cwt4682?context=3 https://np.reddit.com/r/LosAngeles/comments/3s06dt/op_delive... Interestingly you can see 'flip turns' in the video, a maneuver the missile repeats 14 times to disperse its MIRV payload.