In the night sky adjacent to DFW Airport

I"m a 15-year resident in this part of Texas, my home sits upon a hill overlooking miles of Texas terrain, I'm familiar with everything in the night sky as I always stand and watch aircraft go in and out of DFW. Last night there appeared a glowing green to red object stationary in the night sky, then it would move from one location in a straight line, with no sound what so ever, then ascend straight up, stop, then descend to almost ground level. It would rise again slowly move in westardly direction as if it was looking for something.I'm a disabled veteran photographer who saw and document this same event while stationed at Wurtsmith AFB, Oscoda Mich in 1974. Myself, SSgt Lee and MSgt Kerns witnessed and photographed 5 such hovering objects over the flightline glowing green to red as this one did. I considered this to be an observation craft then, and judging from this mornings sighting, this was the same type craft.