Leckey and Petra were torn between pursuing training in Peter Levine’s Somatic Experiencing and Berceli’s Tension and Trauma Releasing Exercises. They attended introductory workshops in both. Petra asked Dr. Berceli how he would describe the difference between the work of Levine and his own, and he said “I’ve had to teach TRE during a five-hour cease fire.” That was the moment she knew that TRE was perfect for what she and Leckey were trying to do.