This is a great site to look at both old and current NYC pictures. Pages on crime, subways, fires, 70's, Times Square. If you have time, interesting to explore:
http://www.skyscrapercity.com/showthread.php?t=402544&page=13 FDNY pictures
http://www.skyscrapercity.com/forumdisplay.php?f=105 main NYC page
http://www.skyscrapercity.com/showthread.php?t=402544&page=13 FDNY pictures
http://www.skyscrapercity.com/forumdisplay.php?f=105 main NYC page