My wife went out to the back yard to have a cig. and seen three trinkling lights S.E. in a triangle formation when they started to get close enough to see that they were 3 triangle shaped objects one of the lights started to shoot straight up. At that time she came in the house to wake me up. When I got to the back yard I saw a triangle shaped object fly over our house heading N.W. 3 lights with a big strobe in the center. WE live fairly close to the Portland, OR. airport and see aircraft fly over all the time and you can hear them. The one that went over the house heading N.W. made no sound what so ever. The other one headed N.E. and was to far away to make out its shape. And I could still see the one that shot straight up in the S.E. but was to far away to make out its shape. My wife said that they were all shaped like the one that went over the house heading N.W. Its just wierd that they didn't make any noise. Sorry that I didn't take a picture of it.