The Small Ships Parade serves as the lead-up to Saturday's "Sail4th 250" event, which is expected to draw large crowds to the city's waterfront.
Two large American flags atop the Brooklyn Bridge -- one of New York City's most heavily secured landmarks -- were replaced sometime during the night with white banners. See photos.
Investigators are trying to figure out how someone swapped out two large American flags atop the Brooklyn Bridge with bleached flags.
