Marines from Combat Logistics Battalion 2, 2nd Marine Logistics Group, listen as counter-IED instructor Travis Hiller talks about a mock IED made from a pressure cooker, planted by instructors on an IED training path in Holly Ridge, North Carolina, Aug. 19, 2014. Instructors hid several mock IEDs to test the group's ability to spot the fake bombs while on a foot-patrol. Earlier that day, the Marines received classroom instruction about various visual indicators in identifying IEDs.