110- Structural Integrity

<p>When it was built in 1977, Citicorp Center (later renamed Citigroup Center, now called 601 Lexington) was, at 59 stories, the seventh-tallest building in the world. You can pick it out of the New York City skyline by its 45-degree … <a href="http://99percentinvisible.prx.org/2014/04/15/110-structural-integrity/" rel="nofollow" target="_blank">Continue reading →</a></p>