Soon after the second plane hits the World Trade Center, the New York Police Department (NYPD) Chief of Department Joseph Esposito calls for the initiation of something called Operation Omega. This puts New York on the highest state of alert, and requires the protection of sensitive locations around the city. NYPD headquarters is secured and all other government buildings are evacuated. [9/11 Commission, 5/18/2004 ; 9/11 Commission, 7/24/2004, pp. 302] Operation Omega is reportedly still in effect a month later. [New York Post, 10/6/2001]