Bank of America Tower, New York

The shock of Sept. 11, 2001 brought a heightened focus to building safety and spawned new security measures at high-profile locations such as the Bank of America Tower in midtown Manhattan. Setbacks from the street, stricter access control and shatter-resistant glass are now common in corporate construction, says New York architect and security expert Barbara A. Nadel. -- Dan Levy
Photographer: David Sundberg for Bloomberg