Official websites use .mil
Secure .mil websites use HTTPS
Lance Cpl. Sean Clancy, a squad leader with Charlie Company, 1st Battalion, 3rd Marine Regiment, and a Hampshire, Illinois native, provides security from a rooftop during Exercise Island Viper aboard Marine Corps Training Area Bellows, Sept. 29, 2016. Exercise Island Viper is a 3-week-long battalion level training evolution workup that focuses on sharpening the infantry skills of the individual, team and squad.