Summary: <p><a rel="nofollow" class="guestlink">Kate Ascher</a>, author of <span class="book"><a rel="nofollow" title="buy this book at Amazon" target="_blank" href="http://www.amazon.com/exec/obidos/ASIN/1594203032/wnycorg-20/"><em>The Heights: Anatomy of a Skyscraper</em></a></span>, and <a rel="nofollow" class="guestlink">Carol Willis</a>, founder, director, and curator of the Skyscraper Museum, discuss the history and future of tall buildings--from Chicago's 17-story Auditorium Building to Dubai's 160-story Burj Khalifa. They'll explain how they're built, how they work, and how they've changed cities.</p>
