What does a city look like? There are cars in a city. A city has many people. There are buses and taxi cabs. A city is a busy place. A city also has buildings. The buildings may be restaurants. They may be museums. They may be office buildings. One city has a special building. It was the tallest building in the world for many years.
In 1886, Richard Warren Sears started a business. He sold gold watches. His business grew. By 1969, his business was one of the biggest in world. Sears, Roebuck & Co. wanted a building. They wanted the tallest building in the world. The building was to be used for office space. The space was for Sears' workers.
In 1970, workers started building the tower in Chicago, Illinois. Three years later, it was finished. On May 3, 1973, the Sears Tower became the tallest building in the world. It remained the tallest building in the world until 1998. Today, it is no longer the tallest building. The tower has 108 floors. Two TV antennas were added. This added about 300 feet to the tower. Sears wanted the tower to be taller. The city said no. The city was afraid that it might take up too much airspace. Airplanes would not be able to fly. It would not be safe.