This project will study whether a new therapy that includes the practice of forms of meditation is helpful for combat veterans returning from deployments in Iraq or Afghanistan suffering with posttraumatic stress disorder (PTSD). "Mindfulness meditation" cultivates present-focused, non-judgmental attention to ones body, emotions, and thoughts, and is proposed to lead to a greater sense of well-being and acceptance and better tolerance of painful and distressing emotions. "Compassion" and "loving-kindness" meditations help stabilize positive emotions like love and compassion, and may also be helpful for chronic pain, and possibly depression and PTSD.