Dr. Stacy Zimmerman, an associate investigator, demonstrates using the Transcranial Magnetic Stimulation (TMS) on Capt. Josh Pearcy, a physician assistant, while Dr. Shane Biedermann and Dr. Harold Ginzburg observe. Biedermann, as the primary investigator, and his team, are looking for combat veteran volunteers with Post Traumatic Stress Disorder to participate in this noninvasive study using electroencephalography.