The Muslim Surveillance Program was conducted by the New York Police Department after the September 11, 2001 terrorist attacks to monitor Muslims in the city. The NYPD dispatched "Mosque crawlers" or "rakers" to surveil mosques and Muslim communities and act as informants to the NYPD. From 2001 until the program was exposed in 2011, the NYPD Intelligence Division employed these informants to photograph license plates of congregants, track the ethnic makeup of worshippers, and collect other information. These informants, sometimes called "rakers," also monitored other places where Muslims congregated, such as restaurants or student organizations, and in some cases attempted to bait people into making incriminating statements.