"CBSN: On Assignment" airs Monday, August 14 at 10 p.m. ET/PT on CBS, and on our streaming network, CBSN.For Victor Thomas, 25, the New York City skyline is a limitless playground. He scales the tallest skyscrapers and captures his strolls along the very edge of buildings -- hundreds of feet off the ground -- in breathtaking photos.The Brooklyn-based...