April 3 (UPI) -- Google is celebrating the 88th birthday of Fazlur Rahman Khan, the structural engineer who designed the Sears Tower, (now known as the Willis Tower), in Chicago. His daughter, Yasmin Sabina Khan, wrote of his accomplishments for Google and the doodle was drawn by Lydia Nichols.
Khan was born in East Bengal, British India, which became East Pakistan and then Bangladesh. He came to the United States for his graduate studies and worked at Chicago design office Skidmore, Owings & Merrill, where he began his work on designing skyscrapers.