Why look up or across when you could look down -- straight down -- from 103 stories off the ground. Several workers at the Sears Tower on Tuesday tried out three of the four glass bays that can now poke out from the building, giving visitors a unique view of the city. The Skydeck bays are retractable and each one is designed to hold 5 tons. (Closeup pictures were taken from the roof at 125 S. Wacker.)