NEW YORK, NY - JULY 22: A police officer Police pauses along the Brooklyn Bridge following the discovery of a pair of white flags that appeared overnight atop the two towers of the Brooklyn Bridge replacing the American flags on July 22, 2014 in New York City. Police are investigating the incident which turned one of New York's iconic pieces of architecture into a police investigation scene as hundreds of curious people looked on. (Photo by Spencer Platt/Getty Images)