Adam Tarplee (left) and Steve Perrin, U.S. Army Corps of Engineers (USACE) Park Rangers with the Fort Worth District, demonstrate self-defense techniques as part of USACE Galveston District's Ranger Appreciation and Refresher Training event, July 14. Policy requires all USACE Rangers to receive eight hours of training annually on a variety of topics such as self-defense, tactical communications, policy, changes in policy, and cultural demographics.