I thought that while the subject of iridiums was hot I would throw in this pic of three together taken back in August 2003. I realize the pic is technically pretty shocking but I was thrilled to be able to get all three in the one frame.
Picture was about 1 minute with an old nikon FG 35mm and 50mm lens on tripod.
The two brightest passed overhead in the same direction about 20 seconds apart.