On December 24, a New York Public Library clerk using a phone booth dropped a coin. Looking up after he retrieved it, he saw a maroon-colored sock held to the underside of the shelf by a magnet. The sock contained an iron pipe with a threaded cap on each end. After consulting with other employees, he threw the device out a window into Bryant Park, bringing the bomb squad and more than 60 NYPD police officers and detectives to the scene.