I was comming back from Des Moines Ia. And thought I saw a helocopter till one flew across the front of my truck. I stoped and got out and stood on the running bord of my truck ,and watched it float away just above the buldings.And there was no sound.Got a good look at it about 15 feet from the front of my truck . I got back to the docks and watched a bunch of them floating around town . And tried to take a photo and my camera died when I zoomed in . It was cold out . So I couldnt stay out any more . They were still there when I left to go home . They were still there when I called my son and had him fill out the form for me online . The time of finishing this report 12:45am. There were still 25+ in the sky I could see .