The jet trail is a slight orange tint because of the setting sun. I could have made it neutral by adjusting the white balance, but I thought it added a nice touch of color to the photo.
I thought about posting the red channel extraction, but the brilliant blue gradient is hard to resist. The red channel extraction produces a true "black and white". I'm guessing most people will like the color better, but speak up if you think otherwize. (Try viewing it with the black background and white border...quite striking.)