a friend and i were were walking outside and looked up at an airplane flying high in the sky. right away i noticed an oject flying behind the airplane.A brief background of myself, i am 36 years old. and have livein fargo most of my life. all except for the time i spent in the air force. from 1983 to 1992. my friend that was with me is 30 years old and has been a close friend for the last five years. on the day of the sighting we were walking outside when i looked up and noticed an airplane flying at high altitude leaving a short contrail behind it. it was high enough so that i really couldnt see the plane but knew it was there because of the contrail. directly behind the plane at a close distance, im not sure how close, it was hard to judge because of the high altitude but i would say within two miles. i saw a single object. i knew it had to be much larger than the airplane since i could see the shape and color. it was very long and skinny. almost pencile like. and very light in color. i would say like a white light. it stayed at a constant distance behind the plane for most of the time i was watching. but at the end of the sighting , the plane kept going in the same straight direction and the object turned more upward at about a 45 degree angle and seemed to speed up rapidly only to dissapere in the distance.the interesting thing to me about the object was that it left no contrail whatsoever. which confirmed for me that it wasnt just one plane following another.