List of tallest buildings and structures
The world's tallest artificial structure is the Burj Khalifa in Dubai (of the United Arab Emirates). The building gained the official title of "Tallest Building in the World" and the tallest self-supported structure at its opening on January 9, 2010. The second-tallest self-supporting structure and the tallest tower is the Tokyo Skytree. The tallest guyed structure is the KVLY-TV mast.
The Towering Inferno
Architect Doug Roberts returns to San Francisco for the dedication of the Glass Tower, which he designed for contractor James Duncan. The Tower, 1,688 feet tall and 138 stories, is the world's tallest building. During pre-dedication testing, an electrical short starts an undetected fire on the 81st floor. Roberts suspects that Roger Simmons, the electrical subcontractor and also Duncan's son-in-law, cut corners. Roberts confronts Simmons, who reveals nothing.