My son-in-law, Warren, is an iron/glass worker. On my recent visit to Chicago, my daughter, granddaughters and I took an architectural tour on the Chicago River. We passed beneath Warren's building. Even though I couldn't see him from the boat, I took a photo and found him once I enlarged the photo. (The building was so tall, I couldn't get the whole thing in the photo from the boat with the lens I had with me.)
The guy is amazing - can you image working up so high?!