2 low slow flying black trianglesI was driving east on Interstate 80 approximately 15 minutes east of Cheyenne Wy when I looked north and saw 2 black wide triangular shaped flying objects. They were flying low and slow like the slow flying bomber planes. The bright lights from the truck stop on the north side of the road were reflecting on the bottom of the 2 crafts enabling me to see the exact shape of them. They each had a light on each of the three points of the triangle. One light was red, one was blue and the third looked white or off white. One was following the other and they were flying west along Interstate 80. They were flying slow enough that I was able to watch them for some time and could even see them in my rear view mirror after I couldn't see them out my window any longer.((ADDENDUM FROM WITNESS)I accidentally entered the wrong date on my report that I just submitted. It was on 04/10/2010 instead of 04/09/2010