Health Effects in the Aftermath of the World Trade Center Attack is a GAO report about the September 11, 2001 terrorist attack. This report identifies a variety of health effects from the 9-11-01 attack, including injuries, respiratory conditions and mental health effects such as depression, anxiety, stress and post-traumatic stress disorder (PTSD). Outlines programs such as the WTC Health Registry to monitor effects. Testimony before the Subcommittee on National Security, Emerging Threats, and International Relations, Committee on Government Reform, House of Representatives. PDF published September 2004 (04-1068T) by the Government Accounting Office.