Here’s the story behind the mysterious balloons floating in Grand Central Station

Source: New York Post

Grand Central is poppin’.   A series of mysterious giant balloons have been floating above the daily frenzy of rushing commuters and wide-eyed tourists in the station’s iconic Main Concourse for months – spurring many passersby to do a double take.   The inflatables have included a bright red heart-shaped balloon; a star emblazoned with “USA” and another in the shape of the No.