dave reports on a story about a proposed 2,000 foot TV tower to be built in Chicago, between the Sears Tower and the John Hancock.

Imagine this addition to Chicago's fabled skyline: a futuristic, tweezer-shaped broadcast tower looming 2,000 feet over the lakefront as one of the world's tallest structures.

The digital age may soon bring this sleek, scissors-like conversation piece to the city, within clear view of the tourists at Navy Pier who will either ooh with awe or laugh with disbelief.

To be designed by prominent architect Cesar Pelli, the tower would help redefine Chicago's horizon. Rising above the skyline between the John Hancock Center and the Sears Tower, it would usher in a new era of daring, ultramodern architecture for the city. Another sensation would be a proposed Santiago Calatrava-designed skyscraper shaped like a drill bit.

The $300 million Pelli tower would function as a platform for local television stations to mount their new high-definition broadcasting antennas.

Instead of building a conventional building that reserves roof space for antennas, the developers--J. Paul Beitler and LR Development Co.--are proposing the lower-cost option of a needle-thin, triple-spired tripod. At the top would be several floors for restaurants and an observation deck, and at the base would be a 400-car garage. The tapered space in between would be largely open, except for six large beams connecting the spires.

...the structure could not lay claim to becoming one of the world's tallest buildings because it isn't technically a building--its structure would not be filled with floors as in a conventional skyscraper.