Photo Information Marines from across Parris Island, S.C., salute the nation's flag Sept. 11, 2013, during a commemorative ceremony dedicated to the lives lost on 9/11. The terrorist attack was the greatest tragedy on U.S. soil since the Japanese attack on Pearl Harbor in 1941. (Photo by Cpl. Caitlin Brink) Photo by Cpl. Caitlin Brink Download Details Share Photo Gallery: Parris Island Marines remember 9/11 16 Sep 2013 | Story by Cpl. Caitlin Brink Marine Corps Recruit Depot, Parris Island PRINT SHARE PARRIS ISLAND, S.C. -- Terrorist attacks 12 years ago killed approximately 3,000 people, making it the greatest tragedy on U.S. soil since the Japanese attack on Pearl Harbor in 1941.