With the destruction of the World Trade Center in the September 11 attacks in 2001 , the Empire State Building again became the tallest building in New York City , but was only the second-tallest building in the Americas after the Willis Tower in Chicago . As a result of the attacks , transmissions from nearly all of the city 's commercial television and FM radio stations were again broadcast from the Empire State Building . The attacks also led to an increase in security due to persistent terror threats against New York City landmarks
September 11 attacks
September 11 attacks
Empire State Building