The skylight of the $4 billion Calatrava-designed WTC Oculus is leaking, forcing the Port Authority to patch up the leaks with flex tape. This past winter the Port Authority spent a whopping $30,000 on tape to seal the leaks in the 355-foot skylight.

The $32 million dollar skylight is retractable; designed to open on September 11th each year and illuminate the space with sunlight during the times the planes hit the Twin Towers. The skylight is operated by 40 individual glass panels, which must each individually open or close – controlled by software that often requires restarting multiple times to get it to work properly.

Click here to learn more about the Oculus and the entire WTC complex.