September 11, 2001: The World Trade Center and surrounding area covered by smoke and ash.
ABC News obtained these previously unreleased photos, taken on 9/11 by the New York City Police Department, through a Freedom of Information Act request.
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger
NYPD/Det. Greg Semendinger