Passage: Wall Street itself and the Financial District as a whole are crowded with highrises. Further, the loss of the World Trade Center has spurred development on a scale that had not been seen in decades. In 2006, Goldman Sachs began building a tower near the former Trade Center site. Tax incentives provided by federal, state and local governments encouraged development. A new World Trade Center complex centered on Daniel Libeskind's Memory Foundations and was under development after the 9/11 attacks. The centerpiece, which is now a 1,776-foot (541 m) tall structure, opened in 2014 and named the One World Trade Center. New residential buildings are sprouting up, and buildings that were previously office space are being converted to residential units, also benefiting from tax incentives. A new Fulton Center is planned to improve access. In 2007, the Maharishi Global Financial Capital of New York opened headquarters at 70 Broad Street near the NYSE, in an effort to seek investors.The Guardian reporter Andrew Clark described the years of 2006 to 2010 as "tumultuous" in which the heartland of America is "mired in gloom" with high unemployment around 9.6%, with average house prices falling from $230,000 in 2006 to $183,000, and foreboding increases in the national debt to $13.4 trillion, but that despite the setbacks, the American economy was once more "bouncing back". What had happened during these heady years? Clark wrote:

Question: What year did the centerpiece open?
2014