Cpl. Brendan Faul, a Marine with Echo Company, 4th Tank Battalion, who's a native of Noblesville, Ind., shows a couple of Bostonian firefighters the mounted M2 .50 caliber machine gun on an M1A1 Abrams Main Battle Tanks May 3 at Boston Common. This exhibition was during the first day of Marine Week Boston, which honors and recognizes the contributions of Marines, including Boston-based hometown heroes and their families. - Cpl. Brendan Faul, a Marine with Echo Company, 4th Tank Battalion, who's a native of Noblesville, Ind., shows a couple of Bostonian firefighters the mounted M2 .50 caliber machine gun on an M1A1 Abrams Main Battle Tanks May 3 at Boston Common. This exhibition was during the first day of Marine Week Boston, which honors and recognizes the contributions of Marines, including Boston-based hometown heroes and their families.