If you were wondering what that was in the New York City sky last night, it was the opening of a three-day laser show in commemoration of the victims of Hurricane Sandy. From the press materials:
Art Production Fund and The Standard present Global Rainbow, After the Storm, a monumental outdoor laser installation by American artist Yvette Mattern on view from 8pm to 2am nightly on November 27th through November 29th from the rooftop of The Standard, High Line and viewable to millions of New Yorkers. Organized in response to Hurricane Sandy, the artist projects seven beams of high power laser light over communities hit hard by the storm, originating on Manhattan’s lower west side and spanning across Brooklyn toward the Rockaways. The installation aims to symbolize hope and act as a call to action to support the communities that were devastated by the storm.