@nycwtc: Construction is officially underway on 2 World Trade Center, the final office tower of the rebuilt World Trade Center campus! American Express has broken ground on its future global headquarters, bringing the long-awaited vision for the site one step closer to completion. Set to open in 2031, the 55-story tower will become the newest addition to the iconic skyline and mark the completion of the commercial World Trade Center campus. #2worldtradecenter #wtc #nyc