The objective of this study is to adapt the 3RP to WTC responders and test its ability to reduce both PTSD and respiratory symptoms. This treatment will be compared to a Health Enhancement Program that addresses negative health behaviors. The investigators will randomly assign 175 patients with ongoing WTC-related PTSD and respiratory illness to the 3RP or Health Enhancement Program and will assess outcomes immediately after the treatment and at 3 and 6 month follow-ups.