William Edwards is a retired U.S. Army colonel and veteran of the Iraq War. He works for Thornton Tomasetti and is a leading industry expert regarding security design and implementation. He lives in Colorado Springs, Colorado. Robert P. Walters, Jr. is a retired major general who served 38 years in the U.S. Army, 12 years with Special Operations Forces and five years in combat including Operations Desert Shield/Storm, Operation Iraqi Freedom, Operation Enduring Freedom, and Operation Freedom Sentinel the counterterrorist effort in Afghanistan. He is a Senior Mentor for the Army’s Mission Command Training Program and lives in Kansas. Paul Zanon has had eight books published, almost all of them reaching the bestselling spot in their respective categories on Amazon. He lives in London, UK, and writes for a number of publications.