Lieutenant Colonel Russell Linwood, ASM is a graduate of the Royal Military College and an infantry officer with over forty-years' experience. As an Officer Instructor at the Australian Army's Infantry Centre during 1976-77, he was instrumental in resurrecting formal sniper training for the Australian Army after a gap of four decades.A qualified Army marksman and sniper, Russell is a three times winner of the Army Top 20 Marksman Badge, co-winner of the 1988 Billy Sing Trophy for sniper pairs and was a runner-up in the World Marksmanship Championships in 1991. Since transferring to the Army Reserves Russell has maintained his interest in sniping, including acting as technical advisor to a number of books on shooting, military sniping and snipers. Glenn Wahlert was born in Melbourne in 1956. He is a graduate of the Officer Cadet School Portsea, Army Command & Staff College, Deakin University and the University of NSW. After 20 years of service in the regular Army he transferred to the Army Reserve where he is currently a member of the Army History Unit, Canberra. In his 'day job' he is a member of Defence's Senior Executive Service and holds the appointment of Director General of Industry Strategy in the Defence Materiel Organisation. Lieutenant Colonel Wahlert is a qualified Army marksman and the author of several books and journal articles on topics ranging from military history to high-technology crime.