architectureland: Willis Tower ( or normally called Sears Tower) was designed by Skidmore Owings &amp; Merrill (SOM) with Bruce Graham as the lead architect in Illinois,Chicago.

architectureland: Willis Tower ( or normally called Sears Tower) was designed by Skidmore Owings & Merrill (SOM) with Bruce Graham as the lead architect in Illinois,Chicago.

architectureland: Willis Tower ( or normally called Sears Tower) was designed