In 2001, the "Big Board", as some termed the NYSE, was described as the world's "largest and most prestigious stock market". When the World Trade Center was destroyed on September 11, 2001, the attacks "crippled" the communications network and destroyed many buildings in the Financial District, although the buildings on Wall Street itself saw only little physical damage. One estimate was that 45% of Wall Street's "best office space" had been lost. The NYSE was determined to re-open on September 17, almost a week after the attack. During this time Rockefeller Group Business Center opened additional offices at 48 Wall Street. Still, after September 11, the financial services industry went through a downturn with a sizable drop in year-end bonuses of $6.5 billion, according to one estimate from a state comptroller's office.