"Nathan Hale (June 6, 1755 – September 22, 1776) was an officer for the Continental Army during the American Revolutionary War. Widely considered America's first spy, he volunteered for an intelligence-gathering mission, but was captured by the British. He is best remembered for his speech before being hanged following the Battle of Long Island." ~ from WikipediaChicago's Sears Tower was the world's tallest building from 1974 until 1998. Currently, it is still the tallest building in the Western Hemisphere.